Ground 14

The landlord must prove that: 

a) The tenant, or someone living in or visiting the property, has caused nuisance or annoyance to anyone living in, visiting, or carrying out lawful activity in the locality.
This includes behaviour likely to cause nuisance or annoyance, even if no formal complaint has been made. Examples include excessive noise, verbal abuse, or antisocial conduct. 

b) Or the tenant, or someone living in or visiting the property, has caused nuisance or annoyance to the landlord or someone employed in connection with the landlord’s housing management functions.
This covers antisocial behaviour targeted at housing officers, repair workers, or contractors employed by the landlord. 

c) Or the tenant has been convicted of using the premises, or allowing them to be used, for illegal or immoral purposes.
This includes offences such as drug production or operating unlawful businesses, and requires a conviction as evidence. 

d) Or the tenant has been convicted of a more serious offence in the locality.
This refers to indictable offences (tried in the Crown Court), and can include serious violence, robbery, or other significant criminal activity. 

 Possession during fixed term 
A possession order under Ground 14 can take effect during the fixed term of the tenancy if the tenancy agreement allows it. 

 Notice period
The landlord can begin proceedings immediately after serving notice.
The notice must still specify a date on which the landlord requires possession and confirm that court proceedings may start at once. 

 Reasonable to order possession
The court must be satisfied that it is reasonable to order possession, even if the ground is proven.