Can't find a pic, but MGA Roadster, with some kind of weird aero kit...Altho the swoop of the body before the rear wheel arch is a little bit different....
Trawling google image for old cars, and i can't find anything closer atm...
Edit: I think you were laying hints about it being a triumph, but i can't find anything that they made with a cooling duct like that on the rear guard...Hope this isn't some weird prototype :/
Another Edit: ARGH i really want to know the answer to this one...lol, i never was much good at classic/vintage cars
ARGH i think if i could see more it would have a "seperated" grille, ie two grille pieces, but i can't for the life of me remember which car has that...though maserati but couldn't find a match....wish i had my car books here
I thought it was this i stared at this for 10mins! but I came to a descision that that wasnt it because of the headlight spacing etc and the third light in the middle I could be wrong though