I'd wait. I've heard of people at the back of processions getting lost because a car had cut into the line and they didn't know where they were going, so I wouldn't want to get in there then hold them up at the lights or something.
Oh the irony.............. some one killed in a road accident because they were speeding has a funeral procession moving at a snail's pace. Maybe their coffin should instead be lashed to the roof of a WRC rally car .........................
I'd wait. I wouldn't overtake in my car, and the etiquette is unchanged (in my mind) because I'm on a different form of transport.
Scalp 'em......![]()