I've been to Hendon Aircraft Museum three times so far this year, and each time I've noticed a car club has met up there in the car park. Mustangs today.
I wondered if it might be of interest to PBF?
The museum costs nothing to get in but the car park is about £3.50 for the day. They have a restaurant there and coffee shop, plus of course over 100 aircraft. Makes a great day out.
I've just started as a volunteer there, helping to look after the aircraft, well cleaning them actually, and I'll be there next Sunday June 20th.
If PBF ever did want to meet up, we'd have to get in touch and formally notify them, and that I believe is all we'd have to do.
http://www.rafmuseum.org.uk/