dunno i got pulled over on the a92 riding home from uni on my TT bike mid afternoon with lights and a high vis vest on
No red lights were jumped or pavements ridden on.
his argument was it was illegal to ride on the road when there was a a cyclepath adjacent*
i had a similar outcome to your mate.
*While i admit it probably isnt clever i wasnt prepared to risk a near new set of tubs on that shambles of a cycle path & i was riding along at a fair clip which would just be dangerous on a shared use path..
Edit: White stone – last i checked we dont live in the arctic circle and thus its not dark at 11am.