I can't see how it can be this cheap really, duty is 70p + vat on the whole so it's minimum is 84p. for 1.08 the tax is 86.4p so they have to find it refine it deliver it retail it all for 21.6p, simply amazing.
//We are probably buying cheap oil off of ISIS :-) //
unlikely. this report is from April, but on the basis that ISIS invoked a scorched earth policy as they retreated, the situation probably hasn't changed.