Today I watched a bus driver in London half pull up to a bus stop and then pull away before stopping when he saw the only person waving him down. She happened to be a little old lady with dark skin and a head scarf. There were murmurs of distaste from the two people standing nearby her but she dismissed the problem with a wave of her hand and walked off.
There seems to have been a noticeable uptick in this sort of thing over the past few months.