Benetton also used Boreham for shakedown runs when they were no.1 Ford users.
Not F1, but in the days of the pre-Tasman down-under series Bruce McLaren once had to run in a new engine on a 200m banked cycling track.
And now I remember that McLaren bought Lydden Hill in order to turn it into a test circuit when testing was unlimited but couldn't get planning permission for the alterations so never ran there.
After Folkingham was taken back over by the MoD for installation of the short-lived Thor ballistic missiles, BRM used to use the runway of another disused airfield at North Witham, beside the A1 south of Grantham.
I never saw F1s at Goodwood in the days of unrestricted noise (although I remember seeing Ray Mallock and Ron Tauranac with the prototype Ralt RT3 Atlantic there ca. 1980) - when would the last F1 to test there have been?
Paul M