Approaches roundabout, no cars anywhere near, brakes and stops for no reason meaning cars behind have to brake hard, idiot!. Next roundabout, takes left lane, but turns right without any indication.
Female driver in a blue hatchback that appeared to be trying her damnedest to cause a major crash on the M1 heading south between Northampton and Milton Keynes.
She was weaving in and out of lanes on the M1 in rainy conditions during morning rush hour traffic at over 80mph with no sign of an indicator and leaving inches between vehicles.
How she didn't wipe out several innocent drivers I'll never know.
Excellent driver