Gazelle Trim Trophy, EG Bates Track Bike, HR Bates Cantiflex bike, Nigel Dean fixed gear conversion, Raleigh Royal, Falcon Westminster.
Easy Solution for Raleigh 20 BB
I've just stumbled across a site in the UK that does cups for Raleigh thread BB's including the right width for your 20, and then also does suitable cotterless square taper axles for them. Cheap as chips, too, at least compared to the Phil Wood cups solutions:
Kinda wishing I'd found this before I sprung a total of £55 on a UN72/Phil Wood solution, but hey, at least it's there for the future. At this price, it's worth trying to get them to ship transatlantic!
Wanted - SRAM/Sachs Elan 12 shifter and clickstick
At one point or another most all brands of bottom brackets made 26tpi replacement cups, I've found that many bike shops today don't even realize they have them on the shelf. I've been able to find both older Sugino and Tange branded 26tpi cups and on occasion oem Raleigh made cups. I've also not seen nearly as many oem Raleigh cups fail as I have Asian made cups. I have many bikes well over 40 years old still running their original bottom brackets and headsets. All it takes is a little grease and keeping them well adjusted to make those parts last.
What I do have problems finding is crank axles, especially older cottered crank styles for oem Raleigh cranks as well as some cotterless (square) axles. I have two that I've been hunting for some time now, one is for a later Raleigh, a 68mm with 26tpi threads, the axle is marked 3RRB in Chromoly steel.
Its for a triple crank and has an extended right side. I am using a 3U for right now but can't get the right chainline with that axle.