Not surprised to see some rental volatility - supply has been trending up in major UK cities and demand has been dampened by lockdown and the challenges of commuting ...
Link to the FT article ... https://www.ft.com/content/2d81120b-da42-4e3e-a165-8fc20f415cbd
Interestingly though ... impacts vary quite widely across the various sub-markets within the cities with the more affordable locations holding up well ... equally the weighted effect of larger falls in some of the most expensive uber prime locations will have a big impact on the 'city level' averages ....