What's the REAL speed record?

[user D]

I know that when he crashed the Vampire dragster Richard Hammond was trying to break the UK land speed record, but that was in a jet. Now I personally don't think jets are real cars so what I want to know is this; What's the UK land speed record in a wheel-driven, petrol-powered car? I guess it's something like an Ultima or McLaren doing 250+, or maybe a Formula 1 stunt, but all I find when I search online is jet-powered-wingless-planes!