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@TheBrick(Tommy)
If it's a English b.b (68 mm shell width) then drive side is LH thread, RH thread on non-drive side.
If it's a Italian b.b (68 mm shell width) then drive side is RH thread, RH thread on non-drive side.
Raleigh had a few strange widths which will make find a replacement b.b dam near impossible but they follow the British threading convention.
More b.b withs and threading info on Sheldon's site, including French and Swiss.