Paul Terry wrote

Worse than that, drivers are often confused by this notion of people
"wanting to board" - some stop, even if nobody boards; some slow down

and look quizzically for some unspecified intention to board; some
sail
past, oblivious to the shaking fists visible in their rear-view
mirrors.

Obviously it will take some time before the customers work out a
suitable protocol.

There remain several problems, ie

(a) at some stops the driver can't see whether there is anyone waiting
when they are in the shelter, sitting on the bench.

(b) a stop that is just one stop before their terminus may well cause
drivers to get creative. I have in mind the Hampton Court Palace Gates
stop where it is conceivable that someone would take the R68 across
Hampton Court bridge to its terminus at Hampton Court rail station but
a clear signal might be expected.

(c) Both TfL and non-TfL buses call at the same stop.

(d) people who are at the stop to use their mobile phones in shelter.

--
Mike D