In F1, Lewis Hamilton, Jonny Herbert, Pedro De Larosa (former European RallyX champion) and reputedly Ayrton Senna.
Rob Miller used to attend a lot of big UK events but has now retired due to the commitment to his day job, design engineer for Honda F1.
We have a guy at West London who also occasionally raced Ginetta's and is currently saving up to run a Fiesta in some series.
Skiddins