Oil prices have eased slightly after hitting record highs on Monday, despite uncertainty as to when BP's key Prudhoe oilfield will resume production.
BP is closing the field, responsible for 8% of daily US oil output, after finding corrosion in transit pipes.
The price of oil in London hit a new record after the move, on fears that limited spare capacity in the global oil market would be further narrowed.
Brent crude futures dipped to $77.98 a barrel, after hitting a high of $78.64.
US light, sweet crude also slid 25 cents to $76.73 a barrel on profit-taking, having risen as high as $77.30.
http://news.bbc.co.uk/1/hi/business/5255034.stm