well as they seem to assume that changing the speed limit would make people obey the rule surely changing the rule on over taking would have the same effect
seriously though if they spent as much time advertising such a change as they do on speed adverts the thing should sink in and it may get some of the more nervous drive to stay off the motorway

( win win there lol )
i do a lot of driving and he amount of time there are more vehicles in the third lane than the two others put together is silly
i think it would lead to less changing lanes and even further ( once it sinks in ) reduce accidents ( yes i agree short term it could take them up but i personally dont think that should stop it )