Kev, Delta Jets are based there with a collection of airworthy Hunters, a Jet Provost and a Gnat, you might see them fly, I hope so as I am going as well!
The Bristol Collection is on site although I don’t know about opening times.
There is also a Mosquito replica based in the Devonair hangars.
Thats all I can think of off the top of my head.
Cheers, Alan