Teri,
What about looking into Bedford Autodrome (Johnathan Palmer Autosport?). They do allsorts of track stuff including a two seater Audi racecar thingy! I've got the number in an old 'Evo' mag feature if you want it!
There is also a place just outside Warwick that does activity days: Clay pigeon shooting, Tank driving, paintball, making a raft to row round a lake, etc. Went there on a corporate day a couple of years back. Was very good. Could find out phone number.
Andy