Call for crackdown on illegal London short-term lets

London's mayor and several councils have called for a new system to be introduced for anyone wishing to offer short-term lets for visitors to the city.

Landlords cannot legally rent out their homes in the capital for more than 90 nights a year under strict regulations, but a BBC investigation found some landlords were being encouraged to break the rules.

The group have written to the government calling for a new mandatory registration system, so landlords would have to log short lets to tourists online.