The SeeRed meeting at Donington Park in September 2007 featured a race for Edwardian Racing Cars, but the car shown in the photograph below didn't take part in that race.
It's a 1907 Stanley Steamer H5, chassis number 3708 which took part in an Edwardian run on the Saturday of the 2-day meeting. The programme of the event didn't list the cars taking part in the run, and just gave this information:
At 9.30am on Saturday up to 15 Edwardian Cars (1905-19) will leave the main paddock on the third 40-mile Grand Prix Run. The run, organised by Ron Birkett, was set up in 2005 to mark the centenary of the first GP at Dieppe.
Behind the Stanley Steamer is an Itala, but I don't have any other information about that car.