If you try the cr list Nigel Land,Neil Foddering,or Noris Lockley sure know their stuff.But you won't find Mick Butler on Cr.
One good guy to talk to is M.Baker.CWM-Y-GEIST FACH
LLANBISTER ROAD
RADNORSHIRE LD1 5UW
PHONE 01547-550606

My 2cents is bikes that have been brush painted are ripe for the do-it-yourself.How can you hurt one that's already in a state of need?BBs are standard parts so replacement parts are easy to get.Same for headsets.(tang is often a modern replacement for a vintage headset)And many of the 50s english L/Ws were fixed gear/single speeds(S/A 4 speeds fit close as well as Cyclo chain pull derailers in 3 speed)Good rims are the weak link it seems.---sam