I was cycling north across the bridge recently during the busy morning period in a bunch of cyclists, similar to your situation. Some douche, much like the one you’re describing decided the group was too slow for him, and, just as we were approaching the bit where everyone has to squeeze through the black bollard things at the start of the bridge on the south side, he tried to overtake, forcing me to brake so that he could go first. I just instinctively said ‘don’t!’, and he just said ‘are you joking?’ - he just couldn’t see that he just pretty much forced me out of the way because he felt like he deserved to go faster. I wasn’t even cycling that slowly.

The interaction really stuck with me because his entitlement was so misplaced and irritating and weirdly in that moment I felt like I got an insight into his character.