TB752 – What is the aircraft in the b/g?

Was just looking at some pics of the Manston Spit’, TB752, and i found this picture, looks like its from around 2004/5, because of the paint scheme, but what is the a/c parked outside? At first glance i thought it was a Schimitar, but a search turned up nothing. I don’t remember any other aircraft outside, been to the place loads of times being just round the corner, so this picture has puzzled me somewhat.

Heres the link for that: http://www.stillphotography.co.uk/gallery/v/Aviation-Photography/spitfire/TB752KH_Z.jpg.html

Also, i have a signed picture of ‘752 by Stanley Tuck, looks to be early 80’s, but it doesn’t have the normal eliptical wings, they look more to be ‘clipped’ Mustang style. Any ideas on either of these?