If I've got the mind to I'll over take anything and everything. If I've only got a few miles left to go I won't. But 20+ miles I will. The camper could of been one of those 35 everywhere, sure big junction coming up, I can wait, or I can get past and not have to trundle along on a big road later. There are a few moments I've been in a rush, but chosen not to over take something. Then later, and normally just as you enter a section impossible to overtake, they change style or slow down. Had it last week in the highlands, lovely long straights, french car. Happily doing 55, ok I can live with that. got to a section that is difficult to pass for many miles, they slowed to 30 and still braked for many corners. Fair enough, french, left hand drive, perception different.
I'm always very nervous overtaking multiple vehicles. I count to 5 if in a line, if no one is making use of that opportunity, I will and normally make myself very visible, flick of main beams inc twinky. Equally a few when I've gone, thinking I was up next and just clocked a bike or similar that wasn't part of the train. So easy to judge from a computer, we've all done similar in one form or another... So I'm not.
tl;dr; Red on Red, should polish out.