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.
Driver cuts me up as he swings from the middle lane to take a left exit. Not content with missing the front of my car by inches he then proceeds to brake check me.
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.