Hmm, £710 for a full carlimits day at bedford. At that price I think I would expect to be turned into a driving god. Maybe worth pushing the boat out for though, even if it is bloomin' miles away! 700 sheets would buy a whole handful of MSV days at Oulton Park though, and you can get extra intruction there, although i would imagine its more track specific than CAT.
You'll get a Walshy day for a lot less if you go for one of the days where there are four participants
Of course you could always come up to Knockers for a day