Does TfL keep a record of which buses start late? And whether the late
start is the driver's fault?
Do they publish the results?

Most people assume there's nothing much the driver can do about late
running buses, aside from things like skipping sections of route (which
is more trouble than it's worth for the passengers) but it's been
observed that occasionally there's an inspector on the B14, and when
that happens it's been running to time (almost unheard of on that
route). And several times I've seen them laid over at Bexleyheath when
they should have started already.

And I'm sure uneven starting times at Woolwich are a big part of the
reason why the 96s are bunched!

--
Aidan Stanger
http://www.bettercrossrail.co.uk