All right, I've given you both a point.
vasilis1200101 was correct with the name as it is registered as a Royal Ruby, but it is in fact an evocation built recently as none of the 12 or so (I believe) original cars have survived.
Its full name is the MEB Royal Ruby, MEB standing for, I believe, Maurice Edwards Bolton. Maurice Edwards was the original designer of the car in 1927 and it is the only car ever to have been built in Bolton. And this evocation does have a Citroen 2CV engine.
I note that it doesn't carry the registration number of any donor car however, its number JKH 969 being issued in Hull in early 1948. They must have simply purchased that number to make the car look old, but to my eyes (being somewhat anal about registration numbers!) it just looks wrong..
Well done both of you.