Manwell:
According to some self righteous posters on this site, they have a devine right to travel at 50 mph on motorways, and sod anybody else it might affect.
I think I’ve flushed most of them out
Thecritic:
I don’t see why the 50mph was to fault in this! may be i am not reading it right but the rigid was not involved as far as I can see! 
That sounds like tunnel vision Doctor.
Mal:
Seems to me it was the Daf drivers fault, due care and attention springs to mind. I dont know about now, but when I took my class1 it was drummed in that “the onus is always on the overtaker”.
I agree Mal, the driver made a swift decision to pull out, and coupled to the porthole sized windows on an XF, it was the wrong one. But the chain of events stem back to Mr 50mph.
spaceman:
There is also the scent of “me, me, me” - the “my journey is the most important” brigade.
That argument is double sided, read my quote
Manwell:
According to some self righteous posters on this site, they have a devine right to travel at 50 mph on motorways, and sod anybody else it might affect.
Thecritic:
Ali when you have got your class 1 licence and after you have got a little bit of class 1 experience then come on here and tell me the diference.
As for your assesment well I am quite sure you did very well, but it aint quite like driving a Artic at work!!
Preach to me after you have been converted.
because lets face, as for Artic driving you have no clue!!
Niether have you Critic, as driving at more than 50 mph on a Motorway seems to be beyond your capabilities.
Dratsabasti:
Driving at 50 on a motorway in my mind is dangerous, to yourself, and to other road users.
You are causing unnessary congestion by causing other vehicles to overtake you and causing bunching behind them, and is wholly discourteous to other road users, also you are deliberately causing an obstruction to others by doing so.
Thecritic:
Reguarly I pass Police cars on the moterway when I am doing 50-53mph
Somehow I dont think they were causing an abstruction!

!
I think they would be causing an “abstruction”(obstruction), but then they have their own set of rules.
As for them cruising at less than 50 mph on a motorway, there would be a reason for doing such a low speed, they are probably fishing or waiting for a certain vehicle to pass. They are also allowed to do well in excess of the 70 mph speed limit, does that make it all right for the rest of to do the same.
Thecritic:
FACT =Speed kills!
WRONG!
FACT= Inappropiate speed kills.
FACT= Unattentive driving kills.
Thecritic:
HaHa its the best part of the day when this happens! I really enjoy it, some do 80 to 40 in 2 seconds then refuse to drive up to 70!!
I am sure most salesmen have no clue on the speed limit on the motorway.

Critic, I think you need to seek help, as you seem to get some sort of sadistic pleasure out of see other road users having to take evasive action, including watching your fellow truck driving comrades having to choose between having to fight their way into lane 2 on a busy motorway so that they can continue to make good progress, or tag along behind at the speed that you think they should be doing.