To think I had every right to be in the right hand lane when driving the speed limit on a dual carriage way

Perhaps it's your kind of attitude that leads to so many people continuing to drive badly. After all nobody ever tries to stop them! The cowardly "nothing to do with me" approach that is so prevalent in our society makes it a lot easier for bullies and lawbreakers to get away with it.

OP has changed her story more than once as the thread went on, but neither was driving sensibly.
Lane hogging can be unsafe and disrupts the flow of traffic. Tailgating is obviously very dangerous. I would say deliberately blocking a speeding tailgater is silly too - no it isn't your fault if someone does, but I pull over and let them go if I can. Why would I want them behind me, putting myself and passengers at risk if I can move out of the way?
This was also taught to me on an advanced driving course - if someone is tailgating, don't block them or speed to get away, pull over when safe, or if approaching a roundabout, for example, circle it then take your exit to allow them to get ahead and yourself out of danger.

@Fatnold odd that you think people driving dangerously are only a danger to themselves and not the vehicles they are very close to 🤔

The 'maths' doesn't tell us anything about the other traffic at all.

Why would one driver manage the maneuver, but another driver in the exact same conditions not?

Maybe because the 'one driver' is willing to speed, and cut people up, in order to manage the manœuver, but the 'another driver' isn't?

Also, tailgater only has to pull back into right lane in front of sedately driving OP. OP would have to pull in front of the (unknown) speed merchants barrelling along in tailgater's wake.

What is dangerous about it? She was driving sensibly, male twat wasn't. He was the one in danger.

I think you've just confirmed my theory 🤣

@Everanewbie that's your prerogative, but you have to accept that if you continue to place yourself in a dangerous situation when you could remove yourself, you are contributing to it.

Obviously if you're 100 yards away from your exit it might not be safe to start quickly changing lanes (traffic dependant), but when you're a mile away, it really shouldn't be difficult.

I agree, but not at the expense of missing my turning. If my lane diverged anywhere between 100 yards and a mile I’d hold my ground.

"Unfortunately there are millions of tossers on the road who thinks they can bully sensible law abiding drivers. Sounds like a lot of them are on Mumsnet."

It's exactly this attitude which leads to road rage incidents! Instead of thinking "oh there's an aggressive asshole driving dangerously close to me, perhaps I should safely manoeuvre away from the hazard" you think "I'm a sensible law abiding driver and I will not be bullied! I will continue to place myself in danger out of principle" 🙄

I once left a work laptop in my friends car. Chased after her when I remembered. Exceeded the speed limit slightly on numerous hopefully safe occasions. I would have been really pissed off to meet you on the road. Not saying I was in the right but your behaviour can really annoy other drivers, and so cause safety issues.

I agree with you OP. You were 100% right to stay in the right hand lane.

Unfortunately there are millions of tossers on the road who thinks they can bully sensible law abiding drivers. Sounds like a lot of them are on Mumsnet.

If you had already seen/passed road signage that indicated that the right hand lane would be splitting off, you were absolutely entitled to be in that lane and Mr Speedy Gonzalez was in the wrong.

You were wrong.

Yes we do, someone previously used maths to calculate it using the OP's statements of distance to the junction.

Also if the other driver did it after tailgating her for a short distance like the OP stated. Then anyone else would have been able to do the same. Why would one driver manage the maneuver, but another driver in the exact same conditions not?

How far from the point where the offside lane diverged did this occur?

Highway Code is keep left unless overtaking, so why were you in the outer lane in the first place.

Because it is a filter lane and she needed to be there to be able to safely exit. It may well have been earlier then necessary, but it is not correct to say that one can only be in that lane to overtake.

It's OK to be in the right lane if you have to be there to turn off soon because the road is splitting.

His behaviour was terrible - tailgating and flashing etc is not OK.

You should have moved over though, just from a safety perspective. If someone is behaving like that then they are a hazard and you need of get out of the way.

Highway Code is keep left unless overtaking, so why were you in the outer lane in the first place.
Your DH is correct
Not your place to dictate the speed others travel at/block them overtaking you just because you're travelling at the speed limit for that stretch of road

Yep. Loads of speedometers where I live. My car shows 3km/h over the actual registered speed. So if the limit is 50, I can drive at 53 and adhere to the limit.

In this situation, yes the OP, (possibly depending on traffic conditions), should have moved over to let twat driver past. However it is wrong for posters to categorically be stating that no-one should ever be in that lane unless overtaking.

Because some people speed. You said he overtook and slightly slowed down but was still going over the limit. So he wanted to drive faster than you were driving, so he wanted to pass you out in order to do that.

If the other driver had the time to undertake and pull back in, you had time to do the same.

We just don't know whether she would have been able to do this without speeding up or cutting up someone in the left hand lane.

And we don't know whether the tailgater was being closely followed by nose-to-tail traffic that would have stopped her from rejoining the right hand lane and caused her to miss her junction.

This absolutely.

The right hand lane is the overtaking lane. Ironically, what you were doing carries the same penalty points / fine as speeding so the law sees you as as bad as each other.

https://www.rac.co.uk/drive/advice/driving-advice/middle-lane-hogging/

You are 100% wrong.