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2012/13
Full YearResults
London | Thursday 16 May 2013
This presentation contains certain statements that are neither reported financial results nor other historical information. These statements are
forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities
Exchange Act of 1934, as amended. These statements include information with respect to National Grid’s financial condition, its results of
operations and businesses, strategy, plans and objectives. Words such as ‘anticipates’, ‘expects’, ‘should’, ‘intends’, ‘plans’, ‘believes’, ‘outlook’,
‘seeks’, ‘estimates’, ‘targets’, ‘may’, ‘will’, ‘continue’, ‘project’ and similar expressions, as well as statements in the future tense, identify forward-
looking statements. These forward-looking statements are not guarantees of National Grid’s future performance and are subject to assumptions,
risks and uncertainties that could cause actual future results to differ materially from those expressed in or implied by such forward-looking
statements. Many of these assumptions, risks and uncertainties relate to factors that are beyond National Grid’s ability to control or estimate
precisely, such as changes in laws or regulations, presentations from and decisions by governmental bodies or regulators (including the
timeliness of consents for construction projects); breaches of, or changes in, environmental, climate change and health and safety laws or
regulations, including breaches arising from the potentially harmful nature of its activities; network failure or interruption (and National Grid’s
actual or perceived response thereto), the inability to carry out critical non network operations and damage to infrastructure, due to adverse
weather conditions including the impact of Superstorm Sandy and other major storms as well as the results of climate change or due to
unauthorised access to or deliberate breaches of National Grid’s IT systems or otherwise; performance against regulatory targets and standards
Cautionary statement
2
unauthorised access to or deliberate breaches of National Grid’s IT systems or otherwise; performance against regulatory targets and standards
and against National Grid’s peers with the aim of delivering stakeholder expectations regarding costs and efficiency savings, including those
related to investment programmes and internal transformation projects (including the US foundation programme); and customers and
counterparties failing to perform their obligations to the Company. Other factors that could cause actual results to differ materially from those
described in this presentation include fluctuations in exchange rates, interest rates and commodity price indices; restrictions and conditions
(including filing requirements) in National Grid’s borrowing and debt arrangements, funding costs and access to financing; regulatory
requirements for the Company to maintain financial resources in certain parts of its business and restrictions on some subsidiaries’ transactions
such as paying dividends, lending or levying charges; inflation; the delayed timing of recoveries and payments in National Grid’s regulated
businesses and whether aspects of its activities are contestable; the funding requirements and performance of National Grid’s pension schemes
and other post-retirement benefit schemes; the loss of key personnel or the ability to attract, train or retain qualified personnel and any
significant disputes arising with the National Grid’s employees or the breach of laws or regulations by its employees; and incorrect or
unforeseen assumptions or conclusions (including financial and tax impacts and other unanticipated effects) relating to business development
activity, including assumptions in connection with joint ventures.
For further details regarding these and other assumptions, risks and uncertainties that may impact National Grid, please read the Business
Review section including the ‘Risk factors’ on pages 41 to 43 of National Grid’s most recent Annual Report on Form 20-F, as updated by
National Grid’s unaudited half-year financial information for the six months ended 30 September 2012 published on 15 November 2012. In
addition, new factors emerge from time to time and National Grid cannot assess the potential impact of any such factor on its activities or the
extent to which any factor, or combination of factors, may cause actual future results to differ materially from those contained in any forward-
looking statement. Except as may be required by law or regulation, the Company undertakes no obligation to update any of its forward-looking
statements, which speak only as of the date of this presentation.
2012/13
Full YearResults
Key Highlights
Steve Holliday | Chief Executive
Introduction
Two years of transition
� Business wide change
� Step change to US performance
� Increasing capital investments
4
Exceptional clarity…
… for the majority of our business
… around financing our growth
… priorities for our leadership team
Agenda
� Highlights
� Business review and financial priorities
� Strategy, growth and returns
5
� Strategy, growth and returns
Good financial performance
Profit before tax1 £2,742m
Operating profit1 £3,644m
�
�
6%
4%
Capital Investment2 £3,700m 9%
�
6
1 Constant currency figures calculated by applying the average 2013 rate ($1.57 to £1.00) to 2012 results (when the average rate was $1.60 to £1.00)
2 Including investment in joint ventures
3 Prior year EPS adjusted to reflect the impact of additional shares issued as scrip dividend
Note Business performance, excluding exceptional items, remeasurements and stranded cost recoveries for continuing operations
All numbers include the impact of timing and storms
Earnings
EPS3
Dividend per share
£2,055m 12%
�
56.1p 12%
�
40.85p 4%
�
£3,700m 9%
�
UKSecure a good RIIO
outcome despite early
financing proposals
Key strategic prioritiesLast two years
�US
Implement major restructuring
Increase jurisdictional focus
Conclude important rate
case filings
7
�
�
UK RIIO outcome
� Around £25bn investment allowance in essential
infrastructure over 8 years
� Clear framework to focus delivery of investment, customer
service and returns ���
8
� Continued incentives to reward customer focus
� Significant incentives around total expenditure
� Underpinned by effective financing framework
– Appropriate costs of debt and equity, capital structures
and transition arrangements
����
UK Operational Progress
� Continued ramp up of major investments
� Grew regulated asset value by £1.6bn, up 7%
9
� In September, launched new UK operating model
- 12 month programme to reshape UK business
- objective to focus business on RIIO outcomes
US Strategic Progress
� Four rate cases approved in Rhode
Island and New York jurisdictions
� Agreed new long term power supply
10
� Agreed new long term power supply
agreement on Long Island
� Extension of rates in KEDNY for two
years agreed
‘Superstorm’ Sandy
11
US Operational Progress
� Implemented new back office SAP system
– replaced multiple legacy platforms
� Invested over £1.1bn or $1.8bn to improve
infrastructure and customer service
12
– replaced multiple legacy platforms
– addresses many regulatory audit findings
– improve information for future filings
� Delivered good rate base growth of 4% and
improved underlying returns to 9.2%
Safety and reliability
Safety
� Major incidents down significantly
� Lost time injury frequency rate of 0.13
� Key focus across the
13
Key focus across the whole business
Service
and
reliability
� UK network reliability remains high
� US building stronger community relationships and improving standards of service
Lost time injury frequency rate is a combined employee and contractor rate
Summary
14
� Well positioned for future
� Major regulatory agreements updated
covering over 80% of asset base
� Significant clarity in the medium term
2012/13
Full YearResults
Business Review
Andrew Bonfield | Finance Director
� Year on year timing effects of £67m
� Higher revenues driven by roll-over year, asset growth
and RPI
� BSIS losses more than offset by strong performance
from other incentives
UK Transmission 44% of Group Operating Profit
Operating profit
19%
277
(24) (7)
Operating profit excluding timing
14%
16
Visual representation only – not to scale
Business performance, excluding exceptional items, remeasurements and stranded cost recoveries
Post retirement costs represent pensions and other post employment benefits
1,354 1,609
67
(24) (7)(58)
2012 operating profit timing net regulated income regulated controllable
operating costs
post retirement costs depreciation & amortisation
2013 operating profit
£m
� Year on year timing effects of £(32)m
� Higher revenues driven by RPI
� Inflation and depreciation increased costs, together with
reduced benefit from metering work
UK Gas Distribution22% of Group Operating Profit
85
Operating profit
4%
Operating profit excluding timing
9%
17
Visual representation only – not to scale
Business performance, excluding exceptional items, remeasurements and stranded cost recoveries
Post retirement costs represent pensions and other post employment benefits
763 794
3
(32)
(13) (2)
(10)
2012 operating profit
timing net regulated income
regulated controllable
operating costs
post retirement costs
depreciation & amortisation
other 2013 operating profit
£m
� Year on year timing effects of £(37)m
� Income driven by recovery of New York deferred costs
� Investment in information systems, environmental
expenses and depreciation increased costs
US Regulated34% of Group Operating Profit
135
33(19)
Operating profit
3%
3%Operating profit excluding timing
and major storms
18
Visual representation only – not to scale
Business performance, excluding exceptional items, remeasurements and stranded cost recoveries
Constant currency figures calculated by applying the average 2013 rate ($1.57 to £1.00) to 2012 results (when the average rate was $1.60 to £1.00)
Post retirement costs represent pensions and other post employment benefits
1,212 1,253
33
(37)
(19)(29)
(17)(58)
2012 operating profit at constant currency
timing major storm costs
net regulated income
regulated controllable operating
costs
post retirement
costs
depreciation & amortisation
bad debts other 2013 operating
profit
£m
US progress in 2012/13
US achieved Return on Equity (%)
8.3%�6.9% 8.8%�
Actual return � as percentage of allowed return �
9.2%�
19RoEs represent calendar year returns. Regulated assets are closing fiscal year balances.
US Regulated Assets
$14.3bn $14.5bn $15.0bn
$1.7bn $1.9bn $2.2bn
2009/10 2010/11 2011/12
Rate Base
Regulated Assetsoutside rate base
�
2012/13
�
� One off costs related to US storms and systems
– ‘Superstorm’ Sandy self-insurance costs
� No contribution from Onstream in metering
Other activities
Operating profit excluding major
storms and systems
Operating loss
£130m
£(12)m
0 2
20
Visual representation only – not to scale
Business performance, excluding exceptional items, remeasurements and stranded cost recoveries
Constant currency figures calculated by applying the average 2013 rate ($1.57 to £1.00) to 2012 results (when the average rate was $1.60 to £1.00)
187
(12)
130
(24)
(35)
(51)
(91)
2012 operatingprofit at
constantcurrency
Grain LNG Property Metering Other 2013 operating
profit excluding
storms and
US system costs
increases
Major
storms
US
systems
2013 operatingprofit
£m
US systems
� Essential investments to improve legacy
systems
– allow delivery of cost savings
– address findings of Liberty and
Overland audit
21
Overland audit
� Higher resource requirements have driven
costs
� Steady progress in solving implementation
issues
48*
130 168
94 61
Regulated controllable operating costs
� Reported increase of £56m: 1% increase on a real basis
� Inflation and cost increases mitigated by efficiency programmes
2
Regulated controllable operating costs
Group efficiency metric
1,950 2,006
2011/12 2012/13
£m
bad debts
pensions & OPEBs
inflation
reg controllable costs
22
1 Regulated controllable costs excluding bad debts, pensions and other post employment benefits (OPEBs). Constant currency
figures calculated by applying the average 2013 rate ($1.57 to £1.00) to 2012 results (when the average rate was $1.60 to £1.00)
2 Regulated controllable costs excluding bad debts, including pensions and OPEBs unadjusted for inflation, divided by asset base. Asset base: mid-year UK regulatory
asset value plus mid-year US rate base. At constant currency
* Includes £5m of inflation related to bad debts, pensions and OPEBs
1
6.86.6
2011/12 2012/13
� Operating profit up £148m, excluding timing and severe
weather
� Revenue increase led by UK and New York deferrals
� Other activities impacted by systems costs
Operating profit
497
33(56) (38)(85)
Operating profit
4%
Operating profit excluding timing
and major storms 4%
23
Visual representation only – not to scale
Business performance, excluding exceptional items, remeasurements and stranded cost recoveries
Constant currency figures calculated by applying the average 2013 rate ($1.57 to £1.00) to 2012 results (when the average rate was $1.60 to £1.00)
Post retirement costs represent pensions and other post employment benefits
3,516 3,644
(2) (18)
(38)(85) (55)
(148)
2012 operating profit at constant currency
timing major storms
net regulated income
controllable operating
costs
post retirement
costs
depreciation &
amortisation
bad debts other other activities
2013 operating
profit
£m
£(142)m y-o-y headwind
Started 2012/13
£110m over-recovered
Ended
£126m over-recovered
Impacts of timing
£3.6bnoperating
£16m in year timing 2012/13
24
Starting numbers restated for finalisation of UK timing (‘k’) and US stranded cost reclassifications
Constant currency figures calculated by applying the average 2013 rate ($1.57 to £1.00) to 2012 results (when the average rate was $1.60 to £1.00)
£(2)m y-o-y
impact in 2012/13
£(142)m including £126m closing balance
£18m in year timing 2011/12
operating profit
£16m in year timing 2012/13
Interest
Finance costs1
£920mBroadly unchanged
25
Broadly unchanged
at constant currency
Business performance, excluding exceptional items, remeasurements and stranded cost recoveries1 Constant currency figures calculated by applying the average 2013 rate ($1.57 to £1.00) to 2012 results (when the average rate was $1.60 to £1.00)
� Continued refinancing of
historic debt
� Lower accretions on RPI
linked debt
Hybrid bond
� £2.1bn raised in National Grid’s
first hybrid bond issuance
� Effective interest rate of 5.45%
� Rating agencies provide 50%
equity credit
26
equity credit
� Supports ongoing capital
investment programme
Interest, tax and earnings
Tax
25%at £(686)m
Earnings per share
12%group
rate
Finance costs1
£920mUnchanged at constant
27
at £(686)m 12%at 56.1p
Business performance, excluding exceptional items, remeasurements and stranded cost recoveries1 Constant currency figures calculated by applying the average 2013 rate ($1.57 to £1.00) to 2012 results (when the average rate was $1.60 to £1.00)
up� Lower UK corporate
tax rate
� Prior year adjustments
Unchanged at constant
currency
� Continued refinancing of
historic debt
� Lower accretions on RPI
linked debt
Year ended 31 March 2013 £m
Operating profit 3,644
Depreciation & amortisation 1,361
Net operating cash flow
£4.1bn
Cash flows
28
Business performance, excluding exceptional items, remeasurements and stranded cost recoveries
Operating cash flows from continuing operations before exceptional items, remeasurements, stranded cost recoveries and taxation
Pensions (413)
Working capital & other (443)
Net operating cash flow 4,149
2013 2012
UK Transmission 1,680 1,397
UK Gas Distribution 666 645
US Regulated 1,124 1,052
£m
Capital investment
29
Other activities 216 281
Joint ventures 14 13
Total 3,700 3,388
London power tunnels
30
2013 2012
UK Transmission 1,680 1,397
UK Gas Distribution 666 645
US Regulated 1,124 1,052
£m
Capital investment
31
Other activities 216 281
Joint ventures 14 13
Total 3,700 3,388
Cash flows and balance sheet
Year ended 31 March 2013 £m
Operating profit 3,644
Depreciation & amortisation 1,361
Pensions (413)
Working capital & other (443)
Net operating cash flow
£4.1bnOperating cash flowafter cash capital investment
792
32
Business performance, excluding exceptional items, remeasurements and stranded cost recoveries for continuing operations
Operating cash flows from continuing operations before exceptional items, remeasurements, stranded cost recoveries and taxation
Working capital & other (443)
Net operating cash flow 4,149
Operating cash flow
after cash capital investment792
Net debt 21,429
£792mNet debt
£21.4bn
Operating return measures
Operating return measures
Regulators
10
12
6
7
8 UK* US
10.3 10.39.9 9.8
9.2
6.7
6.36.0 6.1
33US ROEs presented on a calendar year basis
*UK returns presented on a weighted average vanilla basis
0
2
4
6
8
2009 2010 2011 2012
Allowed Achieved
0
1
2
3
4
5
6
2009/10 2010/11 2011/12 2012/13
Allowed Achieved
% r
etu
rn o
n e
qu
ity
% v
an
illa
re
turn
6.9
8.38.8
9.2
5.0 5.0 5.0 4.8
6.0
Return on Capital Employed
UK movement reflects
continued cost management
Gas Transmission incentives
and rollover revenues
Return on Capital Employed
2011/12 2012/13
�
2010/11
8.5%
7.1%
34
UK
US
8.8%
7.7%
and rollover revenues
8.6%
7.6*%
US reflects cost
savings, higher
revenues under
new rate plans
and deferral
recoveries
�
�
* Excluding major storm impacts
*
Group Return on EquityKey measure of overall value creation
Shareholder value
Group Return on Equity
2012/132011/122010/11
35
11.3% 11.7%10.8%
Overall return for
shareholders on
investment in assets
reflecting actual
financing structure
and goodwill
* Excluding the impact of major storms
**
Guidance for 2013/14
� Revenue increases under UK RIIO price controls
� Guidance on incentive performance & depreciation
� Adjustments for deferral recoveries and storms
� Finance costs will be restated for £200m non-cash IAS19
36
Finance costs will be restated for £200m non-cash IAS19
pensions adjustment
� Underlying interest expected to increase due to carry
costs of pre-financing and increased net debt
� Tax rate 28%
� Capital investment between £3.6bn–£3.9bn
Performance focus going forward
“Delivering regulatory outputs at lowest possible total cash cost”
� Totex key driver of returns - focuses on cash efficient investment
� Asset growth remains significant, drives long-term revenue
growth
� Regulatory outputs continue to drive meaningful incentives
UK
37
“Invest in approved assets, customer service and efficiency”
� Incremental capex continues to earn good marginal returns
� Strong customer service supports regulatory outcomes
� Performing within allowances key to delivering returnsUS
Efficient, sustainable performance
� Focus on profit growth and a high level of cash conversionNon-Reg
Total return for National Grid
Credit Rating A-• Focus on profits,
efficiency and cash
~ 6% per annum• Organic growth led
by RIIO & US reg. investments
totalshareholder
return=
38
Funding• Scrip alternative• Earnings impact of
hybrids etc.
investments
Other projects• Subject to a total
return test
=dividend yield
+growth in the
per share value ofshareholders’
equity
2012/13
Full YearResults
Strategy, growth and returns
Steve Holliday | Chief Executive
Outlook for regulated asset growthNext five years
~ £35bn
> £45bn
US regulated
40
US regulated
UK gas distribution
UK transmission
Dividend policy
“We aim to grow the ordinary
dividend at least in line with the
41
dividend at least in line with the
rate of RPI inflation each year
for the foreseeable future”
Line of sight
� Align employee goals and
behaviours
� Reinforce a performance
culture …
…organic growth
…efficiency
42
…efficiency
…outputs & customer needs
…innovation
…to drive incentive
performance, returns and
cash generation
UKStreamline organisation and
deliver outputs to drive
outperformance under RIIO
Key strategic priorities2013/14
43
UK ‘delivering RIIO’ seminar
� 6 August 2013 – King’s Place, London
� John Pettigrew (UK Chief Operating Officer) and key
operational managers
� How we plan to deliver outputs and behaviours to maximise
44
� How we plan to deliver outputs and behaviours to maximise
our performance
� For joining instructions contact the Investor Relations team
UKStreamline organisation and
deliver outputs to drive
outperformance under RIIO
Key strategic priorities2013/14
USBuild on new rate cases
and systems to enhance
customer service and drive
efficiencies
45
Conclusion and Outlook
� Good financial and solid operating performance
� Strong asset growth and attractive pipeline of
investment opportunities to sustain growth
46
investment opportunities to sustain growth
� Period of significant clarity for our businesses
2012/13
Full YearResults
Appendix
UK Transmission
For the year ended 31 March (£m) 2013 2012
Revenue 4,246 3,804
Depreciation & amortisation (489) (431)
Regulated controllable costs (367) (343)
Post retirement costs (47) (40)
Other costs incl. pass through (1,734) (1,636)
Total UK Transmission operating profit 1,609 1,354
� At actual currency
� Business performance, excluding exceptional items, remeasurements and stranded cost recoveries 48
UK TransmissionOperating profit
For the year ended 31 March (£m) 2013 2012
Electricity Transmission Owner 1,046 854
Electricity System Operator (3) 11
Other electricity 6 11
Sub total – Electricity Transmission 1,049 876
Gas Transmission Owner 271 186
Gas System Operator 258 272
Other gas - 1
Sub total – Gas Transmission 529 459
French Interconnector 23 19
LNG Storage 8 -
Sub total – Other 31 19
Total Transmission operating profit 1,609 1,354
� At actual currency
� Business performance, excluding exceptional items, remeasurements and stranded cost recoveries 49
UK Transmission Gas System Operator
For the year ended 31 March (£m) 2013 2012 2011 2010
Revenue drivers 132 136 79 81
Incentives performance 16 16 23 24
Cost recovery* 283 252 269 293
Timing impacts - 33 9 (6)
Total operating costs excluding depreciation (154) (154) (171) (192)
(19)Depreciation (19) (11) (12) (14)
Operating profit 258 272 197 186
� At actual currency
� Business performance, excluding exceptional items, remeasurements and stranded cost recoveries
* Including recovery of gas permit income, pension & tax allowances, system operation costs and recovery of transportation owner revenue foregone
50
UK Transmission Electricity System Operator
For the year ended 31 March (£m) 2013 2012 2011 2010
Incentive performance (30) (20) 15 15
Prior year BSIS incentive adjustment - - - 5
Cost recovery 925 931 683 1,103
Total operating costs excluding depreciation (885) (889) (644) (1,060)
Depreciation (13) (11) (11) (11)
Operating profit (3) 11 43 52
� At actual currency
� Business performance, excluding exceptional items, remeasurements and stranded cost recoveries
51
UK TransmissionDepreciation & Amortisation
For the year ended 31 March (£m) 2013 2012
Electricity Transmission Owner 310 270
Electricity System Operator 13 11
Sub total – Electricity Transmission 323 281
Gas Transmission Owner 142 133
Gas System Operator 19 11
Sub total – Gas Transmission 161 144
French Interconnector 4 4
LNG Storage 1 2
Sub total – Other 5 6
Total UK Transmission depreciation & amortisation 489 431
� At actual currency
� Business performance, excluding exceptional items, remeasurements and stranded cost recoveries52
UK Gas Distribution
For the year ended 31 March (£m) 2013 2012
Revenue 1,714 1,605
Depreciation & amortisation (261) (251)
Regulated controllable costs (317) (304)
Post retirement costs (41) (39)
Other costs inc pass through (301) (248)
Total UK Gas Distribution operating profit 794 763
� At actual currency
� Business performance, excluding exceptional items, remeasurements and stranded cost recoveries 53
US Regulated
For the year ended 31 March (£m) 2013 2012
Revenue 7,918 7,516
Depreciation & amortisation (430) (406)
Regulated Controllable costs (1,322) (1,279)
Post retirement costs (80) (50)
Bad debt (61) (92)
Major storms (85) (116)
Other costs inc pass through (4,687) (4,383)
Total US Regulated operating profit 1,253 1,190
� At actual currency
� Business performance, excluding exceptional items, remeasurements and stranded cost recoveries 54
Metering, Grain LNG and Property
For the year ended 31 March (£m) 2013 2012
Revenue 319 368
Depreciation & amortisation (88) (111)
Operating costs (excluding depreciation & amortisation) (81) (83)
Metering operating profit (1) 150 174
Revenue 209 208
Depreciation & amortisation (54) (51)
Operating costs (excluding depreciation & amortisation) (69) (71)
1 Included in the results of Metering for the year ended 31 March 2012 are £38m revenue , £17m depreciation, £9m operating costs and £12m
operating profit relating to Onstream up to the date of disposal (October 2011)
� At actual currency
� Business performance, excluding exceptional items, remeasurements and stranded cost recoveries
Operating costs (excluding depreciation & amortisation) (69) (71)
Grain LNG operating profit 86 86
Revenue 53 62
Depreciation & amortisation (1) -
Operating costs (excluding depreciation & amortisation) (25) (37)
Property operating profit 27 25
55
Exchange rates
For the year ended 31 March 2013 2012
Closing $ / £ rate 1.52 1.60
Average $ / £ rate for the period 1.57 1.60
For the year ended 31 March (£m) 2013
Impact on operating profit * 21
Impact on interest * (9)
Impact on tax, JVs and minority interests * (5)
Net impact on earnings * 7
Impact on net debt ** (624)
Impact on book value of assets ** 692
* Currency impact calculated by applying the average 2013 rate to 2012 results
** Currency impact calculated by applying the March 2013 rate to March 2012 balances
� Business performance, excluding exceptional items, remeasurements and stranded cost recoveries56
Pensions & other post-retirement benefit obligations (IAS19 data)
UK US
At 31 March 2013 (£m) ESPS NGUK PS Pensions OPEBs NG total
Market value of assets 1,943 15,449 4,378 1,515 23,285
Present value of liabilities (2,563) (15,998) (5,117) (3,106) (26,784)
Net liability (620) (549) (739) (1,591) (3,499)
Deferred taxation 143 126 303 637 1,209
Liability net of taxation (477) (423) (436) (954) (2,290)
Discount rates 4.3 4.3 4.7 4.7
� OPEBs = other post employment benefits 57
Timing impacts
£m UK Transmission
UK Gas Distribution
US Regulated Total
2012/13 Opening balance * (22) 2 130 110
2012/13 over/(under) recovery 46 (10) (20) 16
2012/13 Closing balance to return / (recover) 24 (8) 110 126
2011/12 Opening balance (7) (20) 101 74
2011/12 over/(under) recovery (21) 22 17 18
2011/12 Closing balance to return / (recover) (28) 2 118 92
Year on year timing variance 67 (32) (37) (2)
* Restated for finalisation of K and recovery of stranded overs and unders through the regulated segment.
• All USD balances stated using the average 2013 rate ($1.57 o £1.00)58
UK Transmission and UK DistributionRegulated asset value (“RAV”) and returns
RAV* and returns reported by regulatory entity as at 31 March 2013 for UK
UK Electricity Transmission (a) UK Gas Transmission (b) UK Gas Distribution
Regulator Ofgem Ofgem Ofgem
Rate base / RAV £10,145m £5,340m £8,330m
Base allowed return4.75%
(‘vanilla’ return)
4.75%
(‘vanilla’ return)
4.94%
(‘vanilla’ return)
(a) Includes electricity system operator regulatory asset base of £93m. The system operator is subject to annual price controls.
(b) Includes gas system operator regulatory asset base of £60m. The system operator is subject to annual price controls.
* Details of returns and rate base for all rate plans can be found at www.nationalgrid.com. 59
Achieved return 5.4% 7.5% 6.0%
Equity / debt (assumed) 40 / 60 40 / 60 37.5 / 62.5
Sharing factors (shareholder retention at RoE)100%
plus incentive schemes
100%
plus incentive schemes
100%
plus incentive schemes
Next price control beginsNew RIIO price control
from April 2013
New RIIO price control
from April 2013
New RIIO price control
from April 2013
Equity / debt (assumed) 40 / 60 37.5 / 62.5 35 / 65
Base allowed return (assumed CoD 2.92%) 4.55% 4.38% 4.24%
Efficiency incentive rate 46.9% 44.4% 63%
New York Jurisdiction Regulated asset base (“Rate base”) and returns
Rate bases are reported by regulatory entity as at 31 March 2013. Returns are those for the calendar year ended 31 December 2012
Long Island(KEDLI)
Downstate New York(KEDNY)
Upstate New York(NMPC Gas)
Upstate New York(NMPC Electric)
Regulator New York PSC New York PSC New York PSC New York PSC
Rate base / RAV $1,902m $2,132m $923m $3,971m
Base allowed return9.8% 9.8% 9.3% 9.3%
60
Base allowed return9.8%
(RoE)
9.8%
(RoE)
9.3%
(RoE)
9.3%
(RoE)
Achieved return 7.2% 11.0% 5.3% 8.7%
Equity / debt (assumed) 45 / 55 45 / 55 48 / 52 48 / 52
Sharing factors (shareholder retention at RoE)
100% to 10.5%
50% to 12.5%
35% to 13.5%
0% above 13.5%
100% to 10.5%
50% to 12.5%
35% to 13.5%
0% above 13.5%
100% to 9.3%
50% to 10.3%
25% to 11.3%
10% above 11.3%
100% to 9.3%
50% to 10.3%
25% to 11.3%
10% above 11.3%
Last / next rate case filingEffective from
January 2008
Effective from
January 2008 (a)
Effective from
April 2013
Effective from
April 2013
a) Awaiting approval of new settlement effective from January 2013.
� Details of returns and rate base for all rate plans can be found at www.nationalgrid.com. National Grid’s estimate of US rate base: regulatory filings or an alternative US GAAP invested capital measure where
either recent rate base filings are not available or where the actual filed rate base currently excludes certain regulatory asset balances.
Massachusetts and Rhode Island Jurisdiction Regulated asset base (“Rate base”) and returnsRate bases are reported by regulatory entity as at 31 March 2013. Returns are those for the calendar year ended 31 December 2012
Massachusetts Electric (a)
MassachusettsGas (b)
Narragansett
Electric (Distribution)
Narragansett Gas
Regulator Massachusetts DPU Massachusetts DPU Rhode Island PUC Rhode Island PUC
Rate base / RAV $1,747m $1,373m $552m $411m
Base allowed return10.35% 9.75% 9.5% 9.5%
(a) Includes Nantucket Electric. The Massachusetts electric rate base includes $33m relating to transmission assets
(b) Massachusetts Gas currently comprises two separate entities: Boston Gas and Colonial Gas. Base allowed and achieved ROEs are weighted averages (using rate base).
� Details of returns and rate base for all rate plans can be found at www.nationalgrid.com. National Grid’s estimate of US rate base: regulatory filings or an alternative US GAAP invested
capital measure where either recent rate base filings are not available or where the actual filed rate base currently excludes certain regulatory asset balances. 61
Base allowed return10.35%
RoE
9.75%
RoE
9.5%
RoE
9.5%
RoE
Achieved return 8.3% 12.2% 6.4% 5.1%
Equity / debt (assumed) 50 / 50 50 / 50 49 / 51 49 / 51
Sharing factors (shareholder retention at RoE)100% to 10.35%
50% above10.35%100%
100% to 9.5%
50% to 10.5%
25% above 10.5%
100% to 9.5%
50% to 10.5%
25% above 10.5%
Last / next rate case filingEffective from
January 2010
Effective from
November 2010
Effective from
February 2013
Effective from
February 2013
FERC JurisdictionRegulated asset base (“Rate base”) and returns
Rate bases are reported by regulatory entity as at 31 March 2013. Returns are those for the calendar year ended 31 December 2012
New England Power
Narragansett
Electric (Transmission)
CanadianInterconnector (a)
Long Island Generation (b)
Regulator FERC FERC FERC FERC
Rate base / RAV $1,006m $527m $37m $464m
Base allowed return11.14% 11.14% 13.0% 10.75%
a) National Grid retains 100% of the return it earns on its stake of ~54% in the Canadian Interconnector.
b) Long Island generation rate base includes peaking plant rate base of $101m
c) Represents a weighted average of our continuing generation (50:50) and peak generation (30:70) plants.
d) Awaiting FERC approval of new settlement effective from May 2013.
� Details of returns and rate base for all rate plans can be found at www.nationalgrid.com. National Grid’s estimate of US rate base: regulatory filings or an alternative US GAAP invested capital measure where
either recent rate base filings are not available or where the actual filed rate base currently excludes certain regulatory asset balances. 62
Base allowed return11.14%
RoE
11.14%
RoE
13.0%
RoE
10.75%
RoE
Achieved return 11.6% 11.6% 13.0% 13.6%
Equity / debt (assumed) 65 / 35 50 / 50 40 / 60 45 / 55 (c)
Sharing factors (shareholder retention at RoE) 100% 100% 100% Incentives
Last / next rate case filing Monthly formula rates Monthly formula rates Monthly formula ratesEffective from
February 2009 (d)
Return on Capital Employed
Year ended 31 March 2013 Year ended 31 March 2012
£m UK US
(Storm adjusted)US UK
US
(Storm adjusted)US
Statutory Operating Profit
Exceptional items, remeasurements and stranded cost
recoveries
2,329
74
1,522
(184)
1,437
(184)
2,093
24
1,270
36
1,154
36
Business Performance Operating Profit
Depreciation and amortisation
2,403
750
1,338
430
1,253
430
2,117
682
1,306
406
1,190
406
IFRS EBITDA
In-year timing
3,153
(36)
1,768
20
1,683
20
2,799
(1)
1,712
(17)
1,596
(17)
IFRS EBITDA excluding timing 3,117 1,788 1,703 2,798 1,695 1,579
63
IFRS EBITDA excluding timing 3,117 1,788 1,703 2,798 1,695 1,579
Regulatory adjustments
Regulatory depreciation
RPI indexation (post tax)
Pension adjustment
UK Repex adjustment
UK regulatory deferred taxation
(1,085)
666
(83)
(228)
175
(430)
-
(180)
-
-
(430)
-
(180)
-
-
(1,014)
606
(79)
(223)
251
(406)
-
(137)
-
-
(406)
-
(137)
-
-
Adjusted profit before tax 2,562 1,178 1,093 2,339 1,152 1,036
Tax rate
Tax
24.0%
(615)
40.0%
(471)
40.0%
(437)
26.0%
(608)
40.0%
(461)
40.0%
(415)
Adjusted profit after tax 1,947 707 656 1,731 691 621
Opening capital employed 22,207 9,217 9,217 20,194 9,074 9,074
Post tax RoCE 8.8% 7.7% 7.1% 8.6% 7.6% 6.8%
Group Return on EquityCalculation
For the year ended 31 March (£m)2013
(storm adjusted)2013
2012(storm adjusted)
2012 2011
Regulatory operating profit per ROCE 3,740 3,655 3,491 3,375 3,295
IFRS operating profit for non-regulated companies and post tax share
of JV’s +57 6 195 195 126
Treasury managed interest deduction + (1,057) (1,057) (1,042) (1,042) (1,150)
Group tax charge + (732) (686) (802) (755) (722)
Tax adjustment for ROCE adjustments and non treasury interest 89 89 60 60 100
Adjusted profit for RoE 2,097 2,007 1,902 1,833 1,649
Opening capital employed 31,424 31,424 29,272 29,272 27,727
Non-regulated companies opening net book value 979 979 1,205 1,205 1,110Non-regulated companies opening net book value 979 979 1,205 1,205 1,110
Joint ventures 341 341 356 356 250
Opening Goodwill 4,776 4,776 4,776 4,776 5,102
Group enterprise value 37,520 37,520 35,609 35,609 34,189
Opening net debt * (19,597) (19,597) (18,731) (18,731) (18,925)
Group equity value 17,923 17,923 16,878 16,878 15,264
Group RoE – nominal (adjusted group profit after tax / group equity value)
11.7% 11.2% 11.3% 10.9% 10.8%
+ Excluding exceptional items, remeasurements and stranded cost recoveries
* 2011 includes a £3.2bn adjustment to normalise for Rights Issue64
Interest cover – calculation
For the year ended 31 March (£m) 2013 2012 2011
Interest expense (P&L) 2,172 2,218 2,415
Hybrid interest reclassified as dividend (2) - -
Capitalised interest 122 124 129
Interest on pensions debt adjustment 60 67 30
Interest on decommissioning liabilities adjustment 1 5 5
Interest on lease rentals adjustment 36 32 30
Pensions interest on scheme liabilities (1,153) (1,203) (1,231)
Unwinding of discounts on provisions (75) (72) (128)
Adjusted interest expense 1,161 1,171 1,250
Net cash inflow from operating activities 3,750 4,228 4,858
Interest income on financial instruments 30 28 25
Dividends received 21 26 9
Working capital adjustment 410 (146) (185)Working capital adjustment 410 (146) (185)
Current pension service cost (177) (159) (165)
add back employer pension contributions 425 415 408
add back interest on pensions debt adjustment 60 67 30
add back lease rentals 109 97 89
add back decommissioning liabilities adjustment
Corporation tax
1(117)
5
(135)
5
(110)
Prior year adjustment (if negative) (239) (149) (163)
add back cash tax paid (for continuing operations) 287 259 (4)
Adjusted funds from operations 4,560 4,536 4,797
Interest cover (adjusted funds from operations / adjusted interest expense) 3.9x 3.9x 3.8x
♦ Business performance, excluding exceptional items, remeasurements and stranded cost recoveries 65
Efficiency metric – calculation
For the year ended 31 March (£m) 2013 2012 2011
Adjusted regulated controllable costs (at constant currency, excluding bad debt expense)(a) 2,174 2,080 2,114
Regulated asset base
UK regulatory asset value(b) 22,564 20,615 19,101
UK capital additions adjustment(c) 1,173 1,021 1,050
Depreciation adjustment(d) (543) (507) (455)
23,195 21,129 19,696
US rate base (at constant currency)(e) 9,217 9,242 9,136US rate base (at constant currency)(e) 9,217 9,242 9,136
US capital additions adjustment (at constant currency)(f) 562 536 547
Depreciation adjustment(g) (215) (210) (222)
9,564 9,568 9,461
Total adjusted regulated asset base 32,759 30,697 29,157
Efficiency: adjusted regulated controllable costs / adjusted regulated asset base
6.6% 6.8% 7.3%
(a) 2012 & 2011 constant currency figures calculated by applying the average 2013 rate ($1.57 to £1.00) to 2012 and 2011 results.
(b) Opening UK RAV inflated to mid year prices.
(c) Adjustment to reflect mid-year growth in the asset base – adds 50% of the full year UK regulated capital investment.
(d) Adjustment to reflect mid-year depreciation – deducts 50% of the full year UK regulated depreciation.
(e) Opening rate base. Constant currency figures calculated by applying the average 2013 rate ($1.57 to £1.00) to 2012 and 2011 results.
(f) Adjustment to reflect mid-year growth in the asset base – adds 50% of full year US regulated capital investment.
(g) Adjustment to reflect mid-year depreciation – deducts 50% of the full year US depreciation66
Weighted average number of shares
For the year ended 31 March 2013 2012
Number of shares (millions):
Prior period as reported (weighted average) 3,565
Scrip dividend shares 94
Current period weighted average 3,664 -
67
Current period weighted average 3,664 -
Weighted average number of shares (2012 restated) 3,664 3,659
Business performance earnings (£m) 2,055 1,828
Business performance EPS (2012 restated) 56.1p 50.0p
UK Transmission
For the year ended 31 March 2013 (£m) RevenueDep’n &
Amortisation
Operating
Costs
Operating
Profit
Electricity Transmission Owner 2,165 (310) (809) 1,046
Electricity System Operator 895 (13) (885) (3)
Other Electricity 51 - (45) 6
Subtotal – Electricity Transmission 3,111 (323) (1,739) 1,049
Gas Transmission Owner 655 (142) (242) 271
Gas System Operator 431 (19) (154) 258Gas System Operator 431 (19) (154) 258
Other Gas 8 - (8) -
Subtotal – Gas Transmission 1,094 (161) (404) 529
French Interconnector 38 (4) (11) 23
LNG Storage 19 (1) (10) 8
Internal eliminations (16) - 16 -
Total Transmission 4,246 (489) (2,148) 1,609
� At actual currency
� Business performance, excluding exceptional items, remeasurements and stranded cost recoveries 1