Hopefully it's not Singer otherwise I won't bother either!
How about Sunbeam; some Hillmans were badged Sunbeam in some overseas markets?
I say it looks like a Hillman because the grille is identical and so are the wheels; that must make it a Rootes Group product and it's too small for a Humber and I hope it's not a Singer so that only leaves Sunbeam (as far as car names go anyway).