Those Chicago ones are awesome.
It’s basically illegal to fly a drone in London these days, but here’s one from a few years ago by Jason Hawkes:
• Video Link
Otherwise - illegal to fly them over 400 feet altitude, within 50 feet of a building or “over crowded areas” (so anywhere in central London is out):
https://www.standard.co.uk/news/lond...-a3224651.html