This pressure group says there is too much airbnb

https://www.actiononemptyhomes.org/facts-and-figures

They say that over 97.5% of homes in London are in primary residential use, i.e not airbnb, not second home, not empty all year except for some wealthy oligarch coming for a couple of weeks.

The numbers might be slightly off as people are not reporting their use of airbnb, but

https://www.selfcatering.co.uk/reports/uk-airbnb-stats/

Claims just 50,000 airbnb homes in London, which is just 1.3% of the housing stock in London (and that 50k number includes those which are primary residential use but the current occupant moves out for a week if they get someone)