Triumph specialist near Chesterfield

With respect to this site, wouldn't you do better asking on, say, the TSSC site? Perhaps the Derwent Valley Area Group?
See: https://www.tssc.org.uk/tssc/areas_final.asp?area_...

John

Or, if you’re a member of the TR Register, you can download/install their app which is very helpful to find local garages!