Id say you are spoton , the local Tesco has a local price policy , basically there is no competition left so they charge what they like as it's 20 mile down the road to the next Tesco which often is up to 5p/litre cheaper as they are near an Asda

It's just like the electric where they put the prices up just before the winter when everybody uses more .
Certainly none of the usual things they trot like there is a war on somewhere to justify it. The way its going will be 1.50 by September

all good for the chancellor as he gets the vat increase for saying nothing.