hate it man!
once was coming back from leeds after a gig about 12ish
no one on the motorway but one guy in the middle lane doing 65,
aproached him in the left lane, went right over the the right lane to overtake, then strait back to the very left, then slowed down, over took again, did it 3 times before he moved over. wasnt getting close to him or being erratic while doing it! just does my head in!