London drivers can kick off quite happily when they need to Thing is, London transport is at such capacity that the buses are obsessively monitored (they are each GPS tracked). Drivers are under immense pressure to keep things moving, and will get disciplined for not doing so. Doing something that delays the bus is a big no-no.

(Which can also lead to drivers allegedly deliberately skipping stops where a wheelchair user is waiting, due to the time taken to extend the ramp, etc.)