That first car . . .
Is a real toughie. The hood ornament looks like a stork, which was famously used by Hispano-Suiza. However, Hissos were big cars and the scale of this car isn't huge, plus the engine isn't crossflow and I believe most of the Hisso inline sixes were.
I am pretty sure that the radiator cowling was provided by the coachbuilder, making identity more difficult as in that case there is no manufacturer's standard shell as a tip off. My gut level feeling is that this car may very well be a "special", or a car built up using bits and pieces from many old cars. Most cars of this sort are pretty crude, but every once in awhile someone does a very nice job to professional standards. Quite a few specials were made in Britain in the '50s, when money was tight and most new cars boring, and this car is right-hand drive. Another possbility is that the car started out as an upmarket but boring sedan which survived many years in good shape but wasn't worth the cost of restoration, so instead someone rebodied it as a more sporting car, and disgarded the original radiator as being too tall. Quite a few nice sedans have lost their identities in this manner through the years.
I noticed that the Bugatti is also right hand drive and painted green too - I wonder if it was supplied as a chassis to a British coachbuilder?
Sudsman: I love your queen, makes me think of what it must have looked like at a Republican women's club meeting on the evening of the presidential election.