Lorries are not like cars where you can accelerate away,they are(supposed to be)restricted to 56mph....Lorries cant always move over to the middle lane.
And anyway dont the broken white lines at the end of the slip road mean "GIVE WAY".....
Okay... what I'm specifically on about here is - stationary/crawling traffic, cars coming onto the motorway from a slip road, lorry drivers could leave a bit of a gap to let other road users onto the motorway, lorry driver doesn't, car driver is stuck waiting for lorry to pass, lorry behind that does the same thing, and the lorry behind that, etc. large queue of cars line up on the slip road causing congestion, drivers at the back of the queue then start queue jumping, etc. Seen it happen loads of times. The lorry drivers that leave a gap aren't really inconvenienced as most of the time the car driver would just pull out into the middle lane. Okay, they car drivers should give way, but there is such a thing as "consideration" - like the drivers who get tired of waiting on busy roundabout junctions and just set off in the hope that whoever is already on the roundabout will give way to them!!
Has there been a relaxation on restrictions? Most lorries seem to go a lot faster these days. I've seen a couple of nasty accidents involving HGVs (7.5Ts), minbuses, transits and the like - junction 25 on the m62 last Friday being an obvious example.