I personally think that the regulations need tightening on this; the housing shortage is so acute that the last hurdle it needs is this type of greed by landlords.
Airbnb introduces 90-day annual limit for London hosts.
Robert Booth and Dan Newling, Thursday 1 December 2016.
ABSTRACT. A quarter of London homes listed on Airbnb were rented for more than 90 days last year, many illegally and in breach of an act intended to stop landlords turning badly needed housing into unofficial hotels. The booming home-sharing website admitted on Thursday that 4,938 of its “entire home” London listings – 23% of the total – were let out for three months or more, despite a law requiring anyone doing so to apply for planning permission.
Follow the above link for the full story.