Goodwood Motor Circuit has been open since 29th March. It's just an open space so it's no different to going to a park, albeit sometimes with a booking on the track.
Race days are different. The circuit is closed all this weekend, for instance, because there are two MSUK events taking place.
Thanks for the info Ian. The email I received wasn't so definitive, simply no spectating. I shall pop along to the FolkMog track day next week emboldened by your explanation and fingers crossed
