I often have reason to go to the garage at HKS Staples Corner. On the 27th June I put in £10 worth and bought some items and a roll. I then went home which is closeby. Soon after I got in the car and headed to Asda in Wembley but the car lost power and could not go further so I dropped it back and into my Close which it did. However I tried again and although it started it also stopped several times. This has never happened before so once it was running I went to Asda and came home. The following however it turned over but immediately stopped. I thought I needed a new car so went without for some days, obviously concerned. I had to call my garage and we all but remade the car. We took out the spark clubs and looking at them I could smell some petrol and something else, maybe some diesel but just something else. We drained the majority of the tank and put another gallon in. Now it was happy to start and for me to get it to the garage. However I have had to have a complete overhall to see what else the comination has caused. Therfore a very expensive stop at Shell. Luckily I have the receipt copied here. But I have been without my car for a week as my garage just did not have time to deal with it until now so as you can imagine I am expremely annoyed and frustrated. This is also very serious in that either there is a lot of contamination in unleaded petrol now or staff put some diesel in and just stopped and put it into the correct place but did not inform anyone. I have had very strange things happen to my cars all over the world and in some very strange places but never has this happened before. Please take this very seriously.