You live next door to Silverstone. Get one for blatting around there on.
The days of getting on the track there uninvited, and being chased round by security, are well and truly over. Sadly.
Pay £100 or so and thrash it around all day long, without getting chased off. Best fun you could have for £100, despite what Opti will say.
Silverstone has gotten fikkin expensive, and £100 won't buy much, probably not even an hour on one of the smaller infield circuits.
The last event I did there, a single seater event (which admittedly they provided the cars), was only on the Stow infield circuit, and that cost a small fortune for 30mins racing - not sure how much, as it was a present from a previous boss*
*at my previous employer, any rewards/recognition were via vouchers which allowed you to buy a wide range of stuff from a catalogue, but as most of it was fashion/jewellery/wannk, when I had to spend my vouchers just before I left, I "bought" some techie stuff like cameras and a couple of red letter type days