All I can bring to mind is a Thomas Special, of which there were several. There was 'Babs' of course, which looked a bit similar to this car but was much larger, and there were, I think, a couple of 'low line' cars built for the British Grand Prix at Brooklands in 1927(?) but didn't look anything like this.
However some sort of Thomas Special would get my vote. The driver appears to be Mr Parry Thomas himself, if the sweater is any sort of clue !