Update: Started the car yesterday afternoon to go home and the engine was misfiring badly, the engine light came on also and the car would not rev properly due to the misfiring. I managed to limp home and had the same thing this morning, engine light still on. I decided I would try some Shell Nitro to see if that helped. Within a couple of minutes the engine light had gone off and my car had returned to normal. I can only conclude that the Tesco fuel was contaminated in some way and my engine did not like it. I will not buy fuel from them again. I will be contacting Tesco to complain about this. I will post back on here if I get any sort of response.

I had the same problem today, needed fuel desperately so filled up at Tesco at Handforth Dean in Cheshire, within 1 mile my car lost power on acceleration and is now running very lumpy. I asked a car mechanic at my work about it and he advises that it's probably contaminated fuel. I have just done a quick Internet search and I came across this post. I can't believe Tesco can get away with selling sub-standard fuel. I for one will never use Tesco fuel again, will pay the extra 1-2p per litre and go for Shell or BP. Hopefully running the fuel down and topping up with some decent fuel will hopefully resolve the problem. I will be taking my complaint further with Tesco.