On the first two Saturdays in March there is a Track Day for the various race series which fall under the Top Hat banner.
These series feature saloons and sports cars from the 60's to the 80's - Minis, Imps Alfas, Cortinas, Anglias and american muscle. Then there's Ferrari, TVR, Jaguars, Astons etc.
To give you an idea here's a couple of links to some pictures from last year.