I have to add, that personally for me, I find lane discipline to be my biggest bugbear with some road users.
There is absolutely no excuse for sitting in an outside lane of a motorway unless you are significantly overtaking somebody. Whether you wish to drive at 69.9 MPH or otherwise, it is not your responsibility or power (unless you are a police officer enforcing the law) to decide or restrict the progress of other road users.
Granted, in Andy K's example, overtaking on the hard shoulder is wrong - but anyone else who complains about somebody overtaking on the inside, in general, is responsible for this. Ie, my point being that if there is space on the inside for somebody to pass, and they wish to progress past you, that is where you should be positioned.
Poor lane discipline, in my mind, can be more dangerous than speeding itself. If people had greater respect for lane discipline, and each other, then this problem would be greatly reduced.
If you do not wish to exceed the speed limit, or drive faster than the vehicle in front of you, stay in the appropriate lane (ie, as far to the left as possible).
Just my opinion,
Will