On 31/03/2017 17:56, tim... wrote:

An heavily laden lorry versus a lightly loaded one, will make for a
quicker overtake on an uphill, because the heavily laden one will slow
down. On the downhill parts, the advantage is gone and all will be
able to do a similar speed.

The lorries that are in the right hand lane clog it up so that all of
the traffic is forced to trundle along at 65 mph for mile after mile
after mile

You're lucky that they are speeding.