Quoted message said:I'm coming up Gloucester Place, doing around 18-20mph, riding well away
from the kerb (ie in the primary position), the idiot must have seen me
because he pulled across into the next lane to overtake me. Then
halfway through the overtaking manoeuvre, he decides to pull in to the
bus stop...
At least after your words the guy might remember he's driving a bus and not
a scooter. I've found a friendly word seems to work well.
'Course, if you were ready for this you'd have bailed out with a scooting
dismount, carefully shoving the bike under his wheels. A nice roll onto
the pavement to provide some dramatic effect for witnesses[1] completes it.
You'll get a shiny new bike out of it and he'll get another black mark for
yet another accident.
[1] or if there are none quickly dive under the now stationary bus with
your legs sticking out to scare the driver.