I have seen a couple of times now where the outside lane closes and merges, the car/van in the lane that is closing, stay in the outside lane and slow down to the speed of the middle lane, at the point where the signs say lanes closes in xx yards, including just stopping and waiting, and not letting anyone past.
Quite amusing to watch but it takes some bottle to do it,
I like the Zip merging idea and it should be accepted and publicised by highway code,