I went for a single seater ride at silverstone in October 2005. What a laugh! It was in a Formula First 80bhp car/kart(!) but it was so funny. If you have a spare £150 you can go tearing round a circuit at the beautiful stowe part of the track for 33 laps. I managed not to spin & came a respectable 3rd out of 12 - not bad considering I started at the back of a pack of 12. Everyone went out to enjoythemselves - the ones who spun off were definitely the fastest (I was 6th overall fastest) and I dont think anyone really cared too much of the results. The briefing was great before you went on track. Then you went a few laps behind a pac car before putting your foot down for some very enjoyable (sometimes hilarious as you took corners sidewards!) fun. it's safe as well - your to speed is about 56mph -and theres lots of run off areas. The marshalls really do look after you. Go on - give it a try. Its called the Silverstone experience.