In all of the driving tests I have taken (normal, PSV1, HGV1 and Police Class I) the designation of motorway lanes has been numbering from right to left.
When motorways were introduced some pillock of a Transport Minister (Marples) called the lanes Slow, Medium and Fast, instead of using their designated names, hence the names seem to have stuck.

My own pet hate is the moron who follows the nearside lane round a roundabout, to take the second or third exit. It appears that this method is taught to new drivers rather than lane discipline in getting into the outside lane and taking the shortest route through the roundabout.
At the same time why do people indicate right on a roundabout?
There is no right turn.
A roundabout is entered as a left turn onto a major road (give way to the right) and is then a right bend with a series of left turns.
Again, it seems to be that the driving instructors have been giving ioncorrect advice.
Colyn.