bought diesel from Tesco Durham 30/11/2011 shortly afterwards car had to go into garage to have diesel drained, I was the 12th car in the garage that wk, same reason, contamination confirmed. Tesco cant help as they say im the only one, newspapers cant help as they need a min of 10 people, posted a notice on facebook & found one person with same problem, same garage, around same time. Have you had or having same problem?