[Madhatter]

There are advantages to driving a vehicle thats not mine, so try it buster and you'll lose.
It is the pushers in, for the same reason the traffic lights work. A constant flow of cars pushing in at the last minute make the traffic stop to create a gap to let the pusher in join. the inside lane is affected by people moving over to try to get round the outside, which slows down the inside lane. generally the inside lane still flows quicker though
It is illegal for any car or lorry to obstruct any lane.
I had human tissue to deliver for transplant quite often, and one day was on my way to liverpool, the outside lane was blocked off, i took advantage until a car pulled out and blocked me, despite me flashing lights and shouting out the window, i had to que in over a mile of traffic, at the lights he even got out tapped me on the shoulder and said anytime. what an absolute moron. just because I didn't have blue lights he ignored me and took the law in to his own hands, blocking the lane just so I didn't push in.
I phones the police for help but they couldn't get anybody there.
I see people flashing lights on the motorway, and yes, do think he's an impatient git, but sometimes, they have a genuine reason to be.