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National Grid

Annual Report and Accounts 2006/07

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Company accounting policies

(a) Basis of preparation of individual financial statements

These individual financial statements of the Company have been prepared in accordance with applicable UK accounting and financial reporting standards and the Companies Act 1985.

The individual financial statements of the Company have been prepared on a historical cost basis, except for the revaluation of financial instruments.

These financial statements are presented in pounds sterling because that is the currency of the primary economic environment in which the Company operates.

The Company has not presented its own profit and loss account as permitted by section 230 of the Companies Act 1985. The Company has taken the exemption from preparing a cash flow statement under the terms of FRS 1 (revised 1996) ‘Cash flow statements’.

In accordance with exemptions under FRS 8 ‘Related party disclosures’, the Company has not disclosed transactions with related parties, as the Company’s accounts are presented together with its consolidated financial statements. Further, in accordance with exemptions under FRS 29 ‘Financial Instruments: Disclosures’, the Company has not presented the financial instruments disclosures required by the standard, as disclosures which comply with the standard are included in the consolidated financial statements.

The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from these estimates.

(b) Fixed asset investments

Investments held as fixed assets are stated at cost less any provisions for impairment. Investments are reviewed for impairment if events or changes in circumstances indicate that the carrying amount may not be recoverable. Impairments are calculated such that the carrying value of the fixed asset investment is the lower of its cost or recoverable amount. Recoverable amount is the higher of its net realisable value and its value in use.

(c) Deferred taxation

Deferred taxation is provided in full on all material timing differences, with certain exceptions. No provision for deferred taxation is made for any timing differences on non-monetary assets arising from fair value adjustments, except where there is a binding agreement to sell the assets concerned. However, no provision is made where it is more likely than not that any taxable gain will be rolled over into replacement assets.

Deferred tax assets are only recognised to the extent that they are considered recoverable.

Deferred tax balances have not been discounted.

(d) Foreign currencies

Transactions in currencies other than the functional currency of the Company are recorded at the rates of exchange prevailing on the dates of the transactions. At each balance sheet date, monetary assets and liabilities that are denominated in foreign currencies are retranslated at closing exchange rates.

Gains and losses arising on retranslation of monetary assets and liabilities are included in the profit and loss account.

(e) Financial instruments

Financial assets, liabilities and equity instruments are classified according to the substance of the contractual arrangements entered into. An equity instrument is any contract that evidences a residual interest in the assets of the Company after deducting all of its liabilities and is recorded at the proceeds received, net of direct issue costs.

Loans receivable are carried at amortised cost using the effective interest rate method less any allowance for estimated impairments. A provision is established for impairments when there is objective evidence that the Company will not be able to collect all amounts due under the original terms of the loan. Interest income, together with losses when the loans are impaired are recognised in the profit and loss account.

Current asset investments are initially measured at cost including transaction costs. Changes in the fair value of investments classified as available-for-sale are recognised directly in equity, until the investment is disposed of or is determined to be impaired. At this time the cumulative gain or loss previously recognised in equity is included in net profit or loss for the period. Investment income on investments classified as available-for-sale is recognised in the profit and loss account as it accrues.

Interest-bearing loans and overdrafts are recorded at the proceeds received, net of direct issue costs, plus accrued interest less any repayments.

Finance charges are recognised in the profit and loss account in the period in which they are incurred.

Derivative financial instruments are recorded as described below.

(f) Hedge accounting and derivative financial instruments

The Company enters into derivative financial instruments (‘derivatives’) in order to manage its interest rate and foreign currency exposures. The principal derivatives used include interest rate swaps, forward rate agreements, currency swaps, forward foreign currency contracts and interest rate swaptions.

All derivative transactions are undertaken, or maintained, with a view to managing the interest or currency risks associated with the Company’s underlying business activities and the financing of those activities.

Derivatives are carried in the balance sheet at their fair value.

Changes in the carrying value of financial instruments that are designated and effective as hedges of future cash flows (‘cash flow hedges’) are recognised directly in equity and any ineffective portion is recognised immediately in the profit and loss account. Amounts deferred in equity in respect of cash flow hedges are subsequently recognised in the profit and loss account in the same period in which the hedged item affects net profit or loss.

Changes in the carrying value of financial instruments that are designated as hedges of the changes in the fair value of assets or liabilities (‘fair value hedges’) are recognised in the profit and loss account. An offsetting amount is recorded as an adjustment to the carrying value of hedged items, with a corresponding entry in the profit and loss account, to the extent that the change is attributable to the risk being hedged and that the fair value hedge is effective.

Changes in the fair value of derivatives that do not qualify for hedge accounting are recognised in the profit and loss account as they arise.

Hedge accounting is discontinued when the hedging instrument expires or is sold, terminated, exercised, or no longer qualifies for hedge accounting. At that time, any cumulative gains or losses relating to cash flow hedges recognised in equity are initially retained in equity and subsequently recognised in the profit and loss account in the same periods in which the previously hedged item affects net profit or loss. For fair value hedges the cumulative adjustment recorded to its carrying value at the date hedge accounting is discontinued is amortised to the profit and loss account using the effective interest rate method.

If a hedged transaction is no longer expected to occur, the net cumulative gain or loss recognised in equity is transferred to the profit and loss account immediately.

Derivatives embedded in other financial instruments or other host contracts are treated as separate derivatives when their risks and characteristics are not closely related to those of host contracts.

(g) Parent Company guarantees

The Company has guaranteed the repayment of the principal and any associated premium and interest on specific loans due from certain subsidiary undertakings to third parties. In the event of default or non-performance by the subsidiary, the Company recognises such guarantees as insurance contracts, at fair value with a corresponding increase in the carrying value of the investment.

(h) Share-based payments

The Company issues equity-settled share-based payments to certain employees of subsidiary undertakings, detailed in the Directors’ Report, the Directors’ Remuneration Report and in note 31 in the consolidated financial statements.

Equity-settled share-based payments are measured at fair value at the date of grant. The Company has no employees. Equity-settled share-based payments that are made available to employees of the Company’s subsidiaries are treated as increases in equity over the vesting period of the award, with a corresponding increase in the Company’s investments in subsidiaries, based on an estimate of the number of shares that will eventually vest. Where payments are subsequently received from subsidiaries, these are accounted for as a disposal of investment.

(i) Dividends

Interim dividends are recognised when they are paid to the Company’s shareholders. Final dividends are recognised when they are approved by shareholders.