Hello Chris/Nigel et al,
A&E was a riot, I had the time of my life helping with escorting the convoy on my 5SW. I will post a picture of her next week, I wont try right now, as I'm overseas with work, in the middle of nowhere with dodgy internet signal.
You may want to make contact with Brian Tillen, a Triumph specialist in Dorset, who knows 1930s - 1950s Triumph singles and twins inside out, top fella.
The comment re rubber work on pre 42 Triumphs I believe to be 100% correct, bikes up to this year having rubber knee grips, foot peg rubbers, hand grip rubbers, etc.
There were two luggage racks, with a slight variation, one rare, the other very rare! The slightly more common variation does turn up occasionally at bike jumbles, and as far as I know exactly the same as the civvy version of the 1930s.
Nice looking bike you have there Chris.