We have a used tool company in Atlanta called Clinton Tools. I was looking for these Whitworth tools for the P-51 When the old man who started the company was still alive. (His son ran it for a while, badly, finally the grandson took it over, he is a real good guy). Anyhow, I went to the old man Clinton, he was a Delta 747 pilot before he retired., and asked about Whitworth tools for the P-51. He told me that a number of years before, he had obtained several US Govt surplus P-51 field service tool kits. Large wooden tool crates with little pockets for virtually every tool you would need, special and ordinary, for servicing a P-51. I quickly began foaming at the mouth, and wanted to know what happened to them. (at the time he had these kits, P-51's had not really become collectors items yet apparently) and he said that no one seemed to want them, and finally a group of Capital Airline mechanics came in and bought up the Whitworth wrenches and sockets. (Capital operated British built Vicount four engined turboprop airliners, powered by Rolls Dart turboprops, one of the very first turboprop engines and built using Whitworth hardware sizes.). Anyway, after he sold the wrenches, he couldn't find any takers for the remainder of the speciality tools so he sold them for scrap!
Charles