psafloyd,
I'm just south-west of Tower Bridge.
My younger son and I took a good-sized swarm (his first!) in Bermondsey Street on Friday afternoon at 5pm, then put it into a nuc around 9pm, when the fliers were back. Plenty of time to chat to passers-by on the merits of urban beekeeping. A couple of people said that they would post the event on YouTube...I'll provide a link if I can find one.
The swarm was from my second-favourite hive, Thames, which I had AS'd. I'm donating it to the LBKA to sell to a new, trained-up bee-keeper in South London. When I inspected yesterday, I found a couple of virgin Qs hemmed into their cells by the bees on an outer frame which I had missed - so there must have been 3 more QCs than I thought there were (one to swarm, two to stay). Mea culpa. So I pulled the other two, so now have a VC from a very placid and productive (but swarmy!) Q to put into a breeding nuc and one spare.
The really positive thing from a PR point of view was that 20,000 bees "went for a walk" on a busy London Street, with two rammed (Friday night!) pubs just 10 yards front and side to the swarm and no-one was stung, no traffic halted and universal support for bee-keeping was expressed by the locals who spoke to me.
I dotted the pubs and shops with some halfcomb sections to show what the bees normally got up to, when they were not on a mass excursion. Apparently, Southwark Council had been called by a troubled neighbour and the local businesses asked by an Environmental bod whether they had suffered any "nuisance". So far, I am not aware of any complaint, apart from my neighbour (search for "Insurance/Neighbours and Stings" thread on this forum for more on this, bless!), who called in the Council.
I will certainly be taking the VC in the breeding nuc to some friends who have a local breeding programme with a big drone-zone bred for non-swarmy characteristics. With my own imperfect bee-management exposed, I don't want to try people's patience with too many impromptu "Meet Your Local Bees" encounter groups, like Friday night !