I went to Oulton Park in 1965 to see Jim Clark race a Ford Cortina and the address was as below. Don't tell me they have moved it? I believe there are about 3 different circuits at Oulton Park for various events.

Oulton Park Circuit
Little Budworth
Taporley
Cheshire.

The address for the other circuit is further north in Lancashire which is far to close to Scotland for my liking!!

Three Sisters Race Circuit
Bryn Road
Ashton-in-Makerfield
Wigan
Lancashire.