Dates have been confirmed for 2012...
April 28th (Spring Perfmormance)
June 9th (Classic and Sports Car)
September 8th (Forge Motorsport)
Last year the Classic and Sports Car Action Day (June) was really, really quiet. Good if you want plenty of track time without too much traffic, and as it's quiet they aren't fussy about cars fitting the 'classic' or 'sports car' theme.