For the private assured tenancies covered here, new Section 21 notices ended on 1 May 2026. A landlord seeking possession now needs an applicable legal ground and the required process.

A notice served before that date can belong to a transitional case. Social housing and other occupancy types have different arrangements. Take earlier notices and tenancy dates to an adviser rather than assuming every old form is either valid or useless.

This lesson covers landlord possession. If you want to leave, use Leaving a Tenancy: Notice and Joint Tenants; a tenant's own notice has different effects.