I won't snatch your Christmas present: Grab it Allan!
That's decent of you!
Was not online for most of yesterday or I'd have replied sooner.
The car is a special called "Dorcas" named after a biblical lady who was "full of good works" and made by the brothers Gordon and Donal Glegg.
Gordon Glegg is at the wheel and Eric Fernihough has the stopwatch as the car takes off at the top of the Brooklands Test Hill.
A massive enlargement of that photo adorned the office walls of Ben Walker from whom I bought the Lea-Francis you see to the left of this. Ben and Eric were great friends, as Brooklands motorcyclists, and Eric prepared the JAP engine in Dorcas. Much later Ben was one of the pall-bearers at Eric's funeral.
Technically this would be Dorcas II in its later version. It had the front end of a BSA three-wheeler (i.e. gearbox, front drive and independent front suspension) and when that JAP engine broke the transmission too often a four-wheel-drive system using long chains to transmit power from front to back was added. I can't remember if the chains would have been visible in this view, so can't be sure that this is 4-w-d but before that Dorcas often ran with twin-tyred front wheels.
In this photo no 12 seems to be Dorcas with twin-fronts and bodywork!