Where's it happening?
The event is based at Castle Combe circuit near Chippenham, Wiltshire. Or, as Google would have it:
When's it happening?
Gates open 12pm Friday 18th March, 2011.
Gates close 5pm Sunday 20th March, 2011.
For day visitors, gates open at 9am and close at 6pm on Saturday and Sunday.
Quarry Corner Entrance
Castle Combe Circuit
Phone 01249 782417
A bit more orientation ...
Here's where the entrance is on the B4039. It's not the main site entrance (Quarry Corner entrance):
This is what the entrance looks like from the B4039 if you are travelling north: