I asked the question at Wheel House Tyres and they suggested 30psi solo or 32 psi 2 up. Personally, I use similar figures to son Rob, despite being 15.75 stone in weight. I find the higher pressures make the bike hop about a bit, particularly the rigid framed ones.
36 4G, 37 VH, 53 ex ISDT KHA (project), 54 KH(A), Healey 1000/4 (project)
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist once more - but not Machine Registrar.