Raeligh don't do any grip days, you will understand why if you visit. It's far far too small for it I think, would hardly get out first gear. The track has been vastly upgraded in the last 2 years and is now pretty good condition. I drift there semi regularly and it's great fun, tight and technical also it's very relaxed as long as you are sensible.
They are also currently extending the track and making it rallycross, haven't got too much info on that at the moment though.