Here is all I know:
Seems to be a 26" frame.
Lug construction on main frame but the seat stays are bolted on.
Serial number at seat clamp: 3051CT
Has strange hole in bottom bracket shell.
"Made In England" stamped on underside of BB.
Forks are of a pretty old construction style.
Has tiny holes to mount a badge on the head tube.
Possibly a Raleigh Bomber from the early 80s, but I am thinking it is a 1940s-1950s Phillips frame from their 'Cyclemaster' line. That filler hole and no Raleigh stampings make me think it is a Phillips...
Attaching pics of my frame, plus two from the Phillips catalogues. Bottom right is frame, fork is center in the other pic.
What do you all think? Year range is hard to figure out from Google.
(Raleigh bought Phillips in the 60s i think, and looks like they dug into Phillips' back catalog 1980 for the Bomber frame - it's nearly identical.)