Oil has snuck up to $58 without anyone noticing. As oil is traded in barrels, the £/$ exchange rate is hurting us too. WTI was $58.11 yesterday; Brent was $56.99. £ was $1.519.
If you look at the oil companies profits for Q1 2009 you'll see that refining margins are up - the refiners are selling wholesale petrol for more money. Quite a few refinieries worldwide have been shut in for long maintenance or with issues. Less capacity in the world market, so prices are up a bit.