I would say the crankset is a generic one, a Raliegh one would have the Raliegh heron cutout in the chainring. Of course it could have been replaced at some point.
Bikes like this were produced en-masse in between the wars, and afterwards, right up until the 1980's.
Mainly produced in Nottingham, but badged as a number of marques, depending on the intended market.
I would strip, repaint (in BRG) and rebuild, it'll make a lovely town bike, if a little scary in the stopping department (as Clarion what rod brakes are like in the wet!) and, of course, be suitable for the London > Brighton classic bike run.
Lastly, where's Hilldodger when you need him? He'd be able to tell you about it, probably.