The final two grounds can be either mandatory or discretionary, depending on the circumstances of the case.
If the tenant has been in 'rent arrears' (has owed rent payments) for three or more months in a row.
If the tenant still owes at least a month's rent by the first day of the Tribunal hearing, the ground is mandatory and the Tribunal must issue an eviction order. The Tribunal must also be satisfied that the arrears were not due to a delay or failure in the payment of a relevant benefit.
If the tenant owes less than a month's rent (or is no longer in arrears) by the first day of the Tribunal hearing, the ground is discretionary and the Tribunal will decide whether it is reasonable to issue an eviction order. In deciding whether it is reasonable to evict, the Tribunal will consider whether the tenant being in arrears is due to a delay or failure in the payment of a relevant benefit.
If the tenant originally moved in because they were an employee of the Landlord or were expected to become one, and now they aren't. The First-tier Tribunal will have to give an eviction order if either:
The Landlord applies within 12 months of the tenant no longer being an employee.
The tenant never became an employee and the Landlord apply within 12 months of the tenancy starting.