This thread seems to have petered out without a definitive answer. The same has just happened to me and I'm not sure what to do. We haven't moved, we've been at the same house for 10 years but we had no notification until this overdue notice. I guess the law has moved on since this thread was started and there are lots of posts about the BP garage at Stansted, so I suspect contacting the manager won't help (judging by the posts they really couldn't care less). Any advice appreciated. Thanks.