I drove from Bury St Eds to Kings Lynn last week.
After the A 11 Thetford bypass there are about three places where one can safely overtake in 35 miles and we were about no 12 in a procession behind 3 or 4 HGVs, a tractor or two and a caravan.
In my rear mirror I could see a BMW in a hurry pulling in and out and eventually passing the cars behind me one by one with accompanying headlamp flashing from oncoming traffic .
He flashed past me ( pers. number plate noted) and repeated the performance with multiple sudden brake lights from traffic ahead before I lost sight of him.
30 mins later as we pulled up to the A10/A47 roundabout traffic lights , to filter left for West Lynn, behold, same BMW with pers number plate alongside us in the long queue to go straight on into K Lynn:
Time saved by such driving? Zero minutes, Risks taked/angered fellow motorists ? probably dozens.
sometimes it's good to plod......