Section a — Housing Act 1985

The tenant or a person residing in or visiting the dwelling-house—

a has been guilty of conduct causing or likely to cause a nuisance or annoyance to a person residing, visiting or otherwise engaging in a lawful activity in the locality, aa has been guilty of conduct causing or likely to cause a nuisance or annoyance to the landlord of the dwelling-house, or a person employed (whether or not by the landlord) in connection with the exercise of the landlord's housing management functions, and that is directly or indirectly related to or affects those functions, or b has been convicted of—

i using the dwelling-house or allowing it to be used for immoral or illegal purposes, or ii an indictable offence committed in, or in the locality of, the dwelling-house.