John B ) gurgled happily, sounding much like they were
saying :

Are they taught to deliberately block both lanes when they stop at
traffic lights, so that no-one else can overtake them?

As a driver of a HGV I can say yes.

If you don't block both lanes, some clever **** a Beemer or Audi or
one of those green-disc-mini-cab-****s will just pour through the gap
squeezing us out with nowhere to go.

I don't see why this is a problem for you. Why not just go /after/ the
Beemer, Audi or minicab has set off - you won't lose much time, as
it'll accelerate faster than you anyway...?

Because there'll be another one/two/seventeen behind it - meaning the bus
can never move off.

Why can't the car wait for the bus/HGV?