In the UK it goes lanes 1, 2, 3. You stay in lane 1. Lane 2 and 3 are for passing only.
You will often see members of the lane 2 owners club just cruising along in lane 2 but this effectively closes lane 1 (undertaking is illegal and very unsafe).
Sitting in lane 3 closes the entire motorway.
I agree there is a speed limit. But the law says you cannot just sit in lane 2 or 3 if you are not overtaking someone. They even updated the law recently. If you hog lane 2 or 3 the police can report you and the penalty is 3 points and £100 fine
People who sit in lane 3 at 69mph are breaking the law and likely to cause an accident by forcing people to pass on the wrong side out of frustration (yes illegal but they will do it) and this is why they are over taking lanes, not just cruising lanes.
Never be the reason someone else does something stupid on the road. Always do the safest thing.
Like I said undertaking is bad. No excuse for doing it, except where it is legal. If someone goes under speed limit in lane 3 you can undertake I believe, though I would still be super cautious.
Obviously speeding is illegal, and I’m not suggesting anyone should support do so. But we should let the police deal with it.
Just to clarify, you don’t think it is ok to sit in lane 2 or 3 at the speed limit if there is room to move over ? Not doing so is also illegal in the UK.
While the majority of people stay within the law (+/- 10%) there are enough people behaving badly on the roads that you should always take that into consideration.
This is a great example of the is/ought problem. You can try your best to make the “ought” true, but don’t neglect what reality “is”. On the road that means; assume there is an idiot nearby, and drive in a way that keeps you safe from their shit.