Thanks again mate. Just had a look at the link you posted; they've done a fantastic job on the mock-up. It is, to all intents and purposes, real! OK, so it's a wooden frame, but it appears to be constructed like the original, and is covered in the correct metal panels, so it is real enough, and good enough to stand alongside the only real one, in the RAF Museum.
The place is only about an hours drive from me, and I didn't know about it - I'll have to make a point of visiting it! Thanks again for the info, much appreciated.
Terry.