in addition to Classic Rendezvous already mentioned, there are
Members of the Veteran-Cycle Club are sent the member-only News and Views which often has frames/parts for identification. Need to join and pay the membership fee
have tried the national Cycle Museum but no luck either. Looks like this frame may remain a mystery unless one pops up somewhere with that distinctive seat tube lug cut out...
in addition to Classic Rendezvous already mentioned, there are
Members of the Veteran-Cycle Club are sent the member-only News and Views which often has frames/parts for identification. Need to join and pay the membership fee
Classic Lightweight's newsletter Cambridge Lightweight News has frames/parts for identification
National Cycle Museum Historical Queries service encourage contact and were thorough in trying to help me recently.
Hilary Stone 'I can also research bikes and their makers – there is a minimum charge of £20 for this.'