Notes to the Group financial statements

for the year ended 31 March 2009

5. Foreign currency

The principal exchange rates used in these financial statements are as follows:

Assets and liabilities of undertakings whose functional currency is not the US dollar are translated into US dollars at the rates of exchange ruling at the balance sheet date and the income statement is translated into US dollars at average rates of exchange (unless this average is not a reasonable approximation of the cumulative effect of the rates prevailing on the transaction dates, in which case income and expenses are translated at the rate on the dates of the transactions). An indication of the sensitivity of the Group’s results to foreign exchange risk is given in note 3.

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