thought it might be useful depending on your location in the UK
first one i always used to use before i lived in central london and my dad has always used him. never had a moment of doubt about his ability or honesty. just north of cambridge...
https://www.paulnobbs-motorcycles.co.uk/
second one is if you like to get your hands dirty in a supervised garage. in oval,central london, The guy who supervises/helps you (matt) is an absolute diamond, cant recommend him enough. tbh i dont think there would be an oval without him.
https://www.ovalmotorcyclecentre.co.uk/
not adds, just people i trust, shame that after 42 years that list isnt longer