I would say so, have left lots of porsches there for several wks at a time never any problems, and i think TVR's are more respected so less chance hopefully of any damage, vandalism, or theft, it seems to have good security around the clock.
It certainly won't be the most expensive car there. I use the airport regularly and always see astons, porsche, bentley etc. You will fit in easily, although try to get a spot up close and central to the terminal entrance. More security/plod/people there.
