"There being no third lane for him to overtake"
So there was a left hand lane for you to pull into to let him pass? you just chose to be a nuisance and a hindrance for half hour, if he wants to speed off who are you to stop him? Stop being a little vigilante and keep to the left.
White Range Rover sport using roundabout Pullan Avenue Harrogate Road to overtake a Vw, no indicator lane change and sharp turn. Dangerous , dash camera shared to OP snap as bad driving not in correct lane and indication of they work?
is it sign-posted? Maybe they didn't know.