i bought a carlton (unknown model) which was in a mates shed fir £10 in about 1979. weinman 730s, brooks b5n lace up saddle, GB maes bars and stem, simplex 5 gears.
someone had drilled a rear dropout for the anti rotation screw on the steel derailleur hanger. one day a mechanical problem with the gears caused the dropout to tear in half.
RIP carlton.
it was replaced by a Toledo cycles 531 plain gauge frame my brother in law pulled from a skip. that one was stolen from my 6th from college.
sorrt for listing 2.
-Steve