Petrol sales went up by 45% yesterday, and diesel by 20%, seemingly the result of the Government’s suggestion that drivers stock up prior to a tanker driver strike.”People, but especially businesses, should look at their contingency plans [for fuel],” said a Government spokesperson yesterday.And David Cameron was evidently not careful enough with his choice of language when he suggested, with typical verbosity, that “if there is an opportunity to top up your tank if a strike is potentially on the way, then it is a sensible thing if you are able to do that.”