Soz, was laid on a bit thick. Just want to make sure you don't get it all your own way as the 90's king
Well, I think it's a Williams-Renault FW14 from 1991. Driver's helmet looks a but like Olivier Grouillard, but don't think its him as I seen no reason why Williams would want of their cars put in the barriers for them.
Will have to wait for the others to jump in. Without clue's I can't think of any other drivers other than Hill and Blundell who were test drivers for Williams and its definitely not them. Probably a weird and wonderful one-off test like Tracy's.
I rarely remember full names, and if I do its for obscure people please log in to view this image Whom, what and when?