From the 2005 accounts page 8:
"In June 2004, the Group entered into hedging arrangements based on the prices of Ultra Low Sulphur Diesel (“ULSD”) at $260 per tonne and Malaysian Crude Palm Oil (“CPO”) at $435 per tonne and production levels of 125,000 tonnes per annum. The arrangement started on 1 April 2005 and runs until 31 March 2007. As described above, the initial period of the hedge was reversed in January 2005, at a cost of £4.6m, reflecting higher ULSD prices and lower CPO prices from the hedge base levels. At current prices, it is likely that the Group will continue to bear high costs on the hedge until it expires. However, the Group will benefit from higher prices on its sales (which in the main reflect ULSD prices) following completion of the plant."