it was quite good last year and the track sessions are only 25 quid if i remember rightly. also found a few other events last night that might be worth thinking about.
PTMshow, 5/6 june, the pod,
http://www.ptmshow.co.uk
Japshow, 23/24 July, the pod,
http://www.japshow.co.uk
JTS, 3rd june, silverstone
http://www.japanesetuningshow.co.uk
JAE, 20-22 july, Peterborough,