An airshow

A picture of some aircraft at a showground. It's impossible to say from this single picture if this is a show where some aircraft were on display or if this is an actual flying aircraft display. The date in unknown, and I can't quite see the number plate on the mini in the background to make out the number plate, but I would guess sometime in the 1970s.

Unfortunately, the picture has suffered a bit over the years and there are quite a few marks and some patches of fungus growing.