Up north nearly everyone like 9 out of ten people give a nod generally, even walkers, unless it’s like Sunday afternoon and the roads are packed. Doesn’t seem to matter what bike or attire.
Spent a week in Somerset / Glos way, 1st ride no one, not one person acknowledged my presence. Thought I must look like a northerner, or it is customary to ignore mtbr's on the road.
Next time followed a Sustrans route (to Humber Bridge), could have been a bit later, nicer weather too. And just about everyone gave a cheery hello, even a policeman on a ramshackle mtb.
Reckon it's the commuters that are miserable fheckherz. And younger women, but that's prolly just an affect I have.