Where to race in the South

[NeilP]

If I was thinking about having a bit of fun with off-road (I usually race touring cars), where could I race in the South of England. I live in Guildford, Surrey. I've seen that there are some tracks in Kent but that's a bit far really. I've also heard about a track in Newbury (which isn't too bad distance wise) but can't find much info about it eg. is it linked to a club, do they race often ?. Are there any other tracks/clubs here in the South ?