The deregulation act of March 2015 changed the way London regulates short-term letting. Before the act Londoners were not allowed to rent out their properties on a short-term basis without first gaining planning permission. The legislation now makes it possible for the council taxpayer to let their property on a short-term basis of fewer than 90 nights in a calendar year. STL is often associated with the loss of permanent housing stock and the change of the character and amenity of neighbourhoods through an increase in transient residents. This animation focuses on the difficulties that London Authorities, now deprived of some of their fundamental tools, face in enforcing the new law.