I noted your reply to JA, Peacehaven and was a bit concerned that your readers may not have understood your point. The Highway Code and the Road Traffic Act are quite clear and that is that passing on the left is not permitted in the UK. However, on a motorway where the traffic to your right is travelling in a queue (undefined) and they are travelling slower than the lane you are in, then and only then you may maintain your speed in your lane even if this means that you pass the vehicles to your right on the 'inside'. Changing lanes to carry out this manoeuvre is not permitted. In the case quoted there appeared to be only one other vehicle and therefore, according to the law you should move from lane one to lane five to pass this vehicle. Clearly this would have been ridiculous and the common sense thing would be to pass on the inside. I wonder how long it will be before we adopt the American system of pass any side?