Section 21 was abolished for all tenancies in England on 1 May 2026. All landlords who want to recover possession must now use Section 8 grounds under the Housing Act 1988, as amended by the Renters Rights Act 2025. A Section 8 notice that is defective in any way will be dismissed by the court. If that happens, the landlord must begin the process again from the start.
What is a Section 8 notice?
A Section 8 notice is a formal written notice served on a tenant to begin the possession process. It must state which possession ground or grounds the landlord is relying on, and give the required notice period for each ground. The landlord then applies to court if the tenant does not leave voluntarily.
Under the Renters Rights Act 2025, Section 8 is the only route to possession for assured tenancies in England. Landlords must use Form 3, or a document containing all the required information. Serving it incorrectly means the court cannot act on it.
Procedural reasons a Section 8 notice fails
These are errors in how the notice was prepared or served. They cause the same outcome as compliance failures: the court dismisses the claim.
Wrong form or missing information
The notice must be served using Form 3, or must include all information that Form 3 requires. This includes the address of the property, the ground or grounds relied upon, the precise statutory wording of each ground, and the date after which court proceedings may begin. A notice that omits any required element is defective.
Insufficient notice period
Each Section 8 ground carries a minimum notice period set by law. The required period varies from immediate commencement of proceedings for severe anti-social behaviour (grounds 7A and 14) to four months for sale, landlord moving in, and redevelopment grounds. For rent arrears ground 8 under the Renters Rights Act, the required notice period is four weeks. If the notice gives less than the required period, it is invalid. The court proceedings date must be calculated correctly from the date of service, not the date of writing.
Ground not met at the date of service
For mandatory ground 8, the tenant must owe at least three months of rent both at the date the notice is served and at the date of the hearing. If the arrears do not reach that threshold when the notice is served, the notice is premature. For most fault-based grounds, the ground must be capable of being proven at service.
Notice not properly served
The notice must reach the tenant. Acceptable methods include personal delivery, first class post to the property, or delivery to a last known address. Landlords should keep a proof of service record: either a signed and dated certificate of service, or the written note "served by [name] on [date]" on a copy of the notice. Without this, a court may find that valid service has not been demonstrated.
Protected period prevents the ground being used
Under the Renters Rights Act 2025, tenants have a twelve-month protected period at the start of a tenancy during which certain grounds cannot be used. Landlords cannot serve notice using ground 1 (owner occupation) or ground 1A (sale of property) during the first twelve months of a new tenancy. A notice relying on these grounds during the protected period is invalid regardless of how well it is otherwise prepared.
Compliance failures that prevent a possession order
These are distinct from errors in the notice itself. They are circumstances where the notice may be technically correct, but the court is prevented by law from granting a possession order. The result for the landlord is identical: no possession.
Deposit not protected or prescribed information not served
If the tenant paid a deposit and the landlord has not protected it in a government-approved tenancy deposit scheme within 30 days of receiving it, the court cannot grant a possession order. The same applies if the prescribed information about the scheme has not been given to the tenant within 30 days. This restriction does not apply to grounds 7A and 14. Landlords can rectify non-compliance before applying to court, but the cost of late protection may include a penalty of one to three times the deposit amount awarded to the tenant.
Not registered on the Private Rented Sector Database
The Renters Rights Act 2025 introduces a mandatory Private Rented Sector Database. All landlords of assured tenancies in England are required to register themselves and their properties. A landlord who has not registered cannot obtain a possession order, except on grounds 7A and 14. The property must be registered before proceedings are issued.
A note on gas safety, EPC and How to Rent
Under the old Section 21 regime, failing to provide a gas safety certificate, an EPC, or the How to Rent guide blocked a Section 21 notice entirely. Section 21 no longer exists. These failures do not carry the same direct bar to a Section 8 notice. However, they remain legal obligations. An expired gas safety certificate carries a civil penalty of up to £30,000. An EICR not renewed within five years can attract a penalty of up to £40,000. And a landlord with a poor compliance record faces greater scrutiny in court, particularly where discretionary grounds are used and the judge must decide whether it is reasonable to grant possession.
What happens if the notice is invalid?
The court will dismiss the claim. The landlord cannot correct a defective notice mid-proceedings. They must serve a new, correctly prepared notice, wait for the applicable notice period to expire again, and then issue fresh court proceedings. This adds months to the process.
If the notice was dismissed because the ground was not met at service, the landlord must also wait until the ground is genuinely established before serving again. For rent arrears, the three-month threshold must be present at the date the new notice is served and must still be present at the hearing date.
The connection between Section 8 and your compliance record
The Renters Rights Act 2025 makes compliance history relevant to possession in a way it was not previously. Courts assessing discretionary grounds must consider whether it is reasonable to grant possession. A landlord appearing in court with expired certificates, an unprotected deposit, or an unregistered property is in a weaker position on every discretionary ground, regardless of the technical merits of the case.
The landlords best placed to use Section 8 successfully are those who have maintained a clear compliance record throughout the tenancy: certificates renewed on time, deposits protected promptly, prescribed information served correctly, and all required documents given to the tenant at the start. Under the current legal framework, this is the baseline required to use the possession process with confidence.
Source: GOV.UK — Evicting tenants in England; Guide to the Renters Rights Act (2025); Housing Act 1988 as amended by the Renters Rights Act 2025. This article is for general information only and is not legal advice.