Paul Corfield wrote

Presumably the research didn't include those I see on almost every
bus
journey who signal the bus too late (either with a V sign or an
angry
fist) as it sails straight pass compulsory bus stops where people
obviously *were* waiting to board.

In such situations the driver is not conforming to the policy.

Last month I had a 111 fail to stop in such a marked manner that the
driver of the following 515 (non-TFL), which did stop on being hailed,
asked if I disliked red buses -

--
Mike D