Similarities to an Armstrong Whitworth perhaps 
Sandra
I like that Sandra, the bonnet shape matches, the radiator matches, the area round the front springs matches and the long running board on which the child and lady are standing is also there.
This one looks to have been converted to electric headlamps, which may date the photo a bit later,but maybe the one in the discovery museum has been heavily restored to look good.
Any records will only show the first registered owner, if the car changed hands after two or three years only the logbook will show the change
Mike