we (UK) are academic adjacent (my team do computers for academics) we have a few people who are Dr. We (everyone, up to and including Professor Sir In-charge-of-everything) are mostly one first name terms; I doubt anyone would say "oy that's DOCTOR JONES" if you called them "Bob" but I expect they would if you said "Mr Jones" (IME this is largely people trying to sell stuff who think the honorific is ingratiating but cba to look up which to use).

I've never talked to any Lords, a few Sirs and Dames, in academia (including with undergrad student) in England the usage tends to just be "Dr Jones" or "Bob" except when you are Out To Impress when you might bring out Professor Sir Bob Jones (OBE); such as on the prospectus... in medical scenarios using "doctor" in place of a name seems fairly common (only of medical doctors though)