If you're going to undertake, at least do it in style......the hard shoulder.
I've seen that far too many times and actually watched a Fire Engine coming back from maintenance drive along the hard shoulder on the M25 for miles. It only had a mechanic on board and he looked well pleased with himself. Bet he did it all the way back to Leicestershire where it had come from.
I expect we've all done the undertake move at some point because of hoggers, as well as going all the way out the the outside lane and cutting back across their nose - at which point as said they suddenly realise there's a whole empty strip of Tarmac to their left that they could use instead!
As for 'tram lining' a lot of the hoggers cars aren't wide enough to do that!!
Perhaps we all need dashcams and an account with DfT for sending it in to........I wonder if we can play the Apple stunt and get 30% of the fines....... >:D
Richard