More disappointment from Megabus

A couple of months ago here I'd mentioned how local Megabus drivers appear to like making a left turn by going five-quarters of the way around the roundabout. Today I saw a variation of that in which the driver simply turned left from the right-or-ahead lane. I wonder if this lack of regard for the Highway Code is actually taught them or if they are just under unreasonable pressures that cause them to save a minute or two by joining whichever lane is shortest.