The M1 and M25 are great for that too! Numerous times I've been using the virtually empty lanes 1-2 at 70mph while lane 3 is packed and doing 60mph or slower and lane 4 is doing 80mph..
What part of peoples brains doesn't work properly when they can see cars going faster than them on their left but decide that staying in the traffic of lane 3 is preferable???
Remember that there are parts of the M25 where L1 is essentially an extended slip road leading from one junction to the next.
Unless I am actually wanting to use the next exit in these stretches, I wont use L1 either.

