It happened again this morning when I was driving up the motorway to work. There was a car in the middle lane which was only just faster than the lorries with a clio close behind it. I passed the lorry behind them, pulled in to let a car that wanted to break the spead limit pass me and then pulled back out to pass the two cars.

As I was going past the clio it started to pull out into my lane and then suddenly corrected. My instinctinve reaction was to hit the horn. I passed the cars, pulled in and continued to my junction. As I queued at the traffic lights to go onto the junction the clio pulled up behind me and I got a very embarised wave from the driver.

Luckily no harm done, but it could have been nasty.