At the 1987 British Grand Prix weekend, future F1 World Champion Damon Hill took part in two support events, his usual British F3 Championship campaign (finished 5th) and a one-off outing in the MG Metro Turbo Challenge.
The picture is from a test on Friday, 3rd July 1987, in preparation for the Esso MG Metro Challenge Race at Silverstone on 11th July.
A picture of Damon Hill testing the Metro is in the Autosport issue of 9th July which reported he would be racing the car at the British GP support race for Gray-Woolf Racing alongside teammates Michael Cullen, Barbara Cowell and Chris Taylor.
Hill is not mentioned in the report of the race in the Autosport issue dated 16th July, and the results only show the top ten finishers, so he would have had to have finished 11th at the highest, unless he retired. There were 38 starters, so he could have had an anonymous race in the midfield.
In this race, the celebrity cars were driven by David Sears and Mark Hales, though the Autosport 1987 British GP supplement suggested Johnny Dumfries was going to be driving one of the celebrity cars.
Damon's #16 car was usually driven by Featherweight boxer Barry McGuigan, which suggests he stood in for McGuigan, following the recent passing of McGuigan's father Patrick, though I have yet to find any sources to support this.