Indeed you can
£160 for a day at Silverstone, similar for Brands Hatch. Smaller, less famous tracks (and there are a few) also do open-track days, generally for about £70/80.
I needed 4 new tyres after a day at Castle Coomb though..
(
A!. touching Shatner's Bassoon.,
Thu 4 Sep 2003, 15:24,
archived)