Just thought I'd add to this although the lines do not exist anymore. Many a time I was in the middle lane when vehicles to the right and left were not in correct lane and I had to toot my horn
before they hit me but one time a few years back it did not help as I was hit in the front wing by a gent in the lane to go around the roundabout. He turned out to be the father of the bloke who owns Cavanaghs :-)