THE PROPERTY FILTER TAKE
The Supreme Court has granted a landlord leave to appeal in *Harker v Hubert*, challenging a Court of Appeal ruling that a missing pre-occupation gas safety certificate permanently invalidates a Section 21 notice - even where the requirement did not yet exist when the tenancy began.
According to David Smith of Bishop & Sewell (LandlordZone), several hundred possession cases are currently stayed pending this outcome; The Negotiator reports several thousand more Section 21 claims are still active in the county courts. Landlords whose cases have already been dismissed are unlikely to benefit.
You may wish to check every active or pending possession claim to confirm whether a pre-occupation gas safety record was provided and retained on file, and consider seeking legal advice before proceeding.
The Supreme Court will hear a landmark appeal on whether missing a pre-occupation gas safety certificate permanently invalidates a Section 21 (no-fault possession) notice. According to David Smith of Bishop & Sewell, as reported by LandlordZone, several hundred possession cases are currently stayed pending this decision. The Negotiator separately reports several thousand Section 21 claims are still active in county courts across England.
What is the Harker v Hubert case about?
The dispute centres on a tenancy that began in 2007. That was well before the Deregulation Act 2015 linked compliance with Gas Safety (Installation and Use) Regulations to the validity of Section 21 notices under the Housing Act 1988. According to LandlordZone, the landlord claimed a gas safety certificate existed at the start of the tenancy but was later lost. They could not prove it had been provided to the tenants before they moved in.
The tenants argued that the Section 21 notice served on them in 2023 was therefore invalid. A county court rejected their claim in 2025, but the Court of Appeal reversed that decision. The landlord has now been granted leave to appeal to the Supreme Court, according to The Negotiator.
What did the Court of Appeal decide in April 2026?
The case is reported as Muca v El Amrani; Harker v Hubert [2026] EWCA Civ 515. The Court of Appeal ruled on 30 April 2026 that landlords must provide a gas safety record before a new tenant first occupies the property. According to Paris Smith solicitors, if this step is missed it cannot be corrected later - even if valid annual certificates were provided in subsequent years. These are two separate requirements. The annual renewal rule and the pre-occupation rule are not interchangeable.
Under the Gas Safety (Installation and Use) Regulations, the deadline for providing an annual gas safety record to existing tenants is 28 days from the date of the annual check. The pre-occupation requirement has no grace period. David Smith told LandlordZone that this second rule "was widely flouted." Many landlords and agents assumed that providing a GSC within 28 days of the tenancy start was enough. It was not.
In practice this means: if you served a Section 21 notice before 1 May 2026, check your files. If you cannot produce evidence that a gas safety record was given to your tenant before they moved in, your notice may be invalid. Getting this right is part of the same compliance discipline covered in our guide to business and systems for landlords.
Who is affected, and why does it still matter?
Section 21 was abolished by the Renters' Rights Act 2025, which came into force on 1 May 2026. That does not close this case. According to David Smith of Bishop & Sewell, as reported by LandlordZone, several hundred possession cases are currently stayed. Each is waiting on this outcome to determine whether notices are valid. The Negotiator separately reports that several thousand Section 21 cases are still being heard in the county courts. The two figures are consistent: hundreds of cases are formally stayed; thousands more are still working through the system.
The ruling will also continue to affect Welsh landlords. As The Negotiator reports, "Wales has and will continue to have a very similar restriction on Gas Safety Certificates for its Section 21 equivalent."
A related precedent is worth understanding. In Trecarrell House v Rouncefield, the Court of Appeal ruled on a similar but distinct scenario. Where a landlord had obtained a certificate before move-in but simply had not given it to the tenant, the omission could be remedied. Harker v Hubert goes further. The Supreme Court must now decide what happens when there is no record that a certificate existed at all at the relevant time.
If you want to understand the full range of your obligations as a landlord, the Property Filter free resources hub is a practical starting point. For landlords reviewing their overall approach in the light of compliance risk, it is worth revisiting property investment strategies with regulatory exposure in mind.
Key takeaways
• The Supreme Court has granted leave to appeal in *Harker v Hubert*, which could directly affect several hundred stayed possession cases and inform thousands of active Section 21 proceedings in England, plus equivalent no-fault cases in Wales.
• Under the Gas Safety (Installation and Use) Regulations, landlords must provide a gas safety record before a new tenant moves in. The 28-day deadline applies to annual renewals for existing tenants and is a separate, distinct requirement.
• The Court of Appeal ruled on 30 April 2026 that failure to provide a pre-occupation gas safety record permanently invalidates a Section 21 notice and cannot be corrected retrospectively.
• The key legislative change linking gas safety compliance to Section 21 was introduced by the Deregulation Act 2015, amending the Housing Act 1988.
• According to David Smith of Bishop & Sewell, landlords whose Section 21 claims have already been dismissed by a court are unlikely to benefit from a landlord-friendly Supreme Court outcome.
The Supreme Court will hear a landmark appeal on whether missing a pre-occupation gas safety certificate permanently invalidates a Section 21 (no-fault possession) notice. According to David Smith of Bishop & Sewell, as reported by LandlordZone, several hundred possession cases are currently stayed pending this decision. The Negotiator separately reports several thousand Section 21 claims are still active in county courts across England.
What is the Harker v Hubert case about?
The dispute centres on a tenancy that began in 2007. That was well before the Deregulation Act 2015 linked compliance with Gas Safety (Installation and Use) Regulations to the validity of Section 21 notices under the Housing Act 1988. According to LandlordZone, the landlord claimed a gas safety certificate existed at the start of the tenancy but was later lost. They could not prove it had been provided to the tenants before they moved in.
The tenants argued that the Section 21 notice served on them in 2023 was therefore invalid. A county court rejected their claim in 2025, but the Court of Appeal reversed that decision. The landlord has now been granted leave to appeal to the Supreme Court, according to The Negotiator.
What did the Court of Appeal decide in April 2026?
The case is reported as Muca v El Amrani; Harker v Hubert [2026] EWCA Civ 515. The Court of Appeal ruled on 30 April 2026 that landlords must provide a gas safety record before a new tenant first occupies the property. According to Paris Smith solicitors, if this step is missed it cannot be corrected later - even if valid annual certificates were provided in subsequent years. These are two separate requirements. The annual renewal rule and the pre-occupation rule are not interchangeable.
Under the Gas Safety (Installation and Use) Regulations, the deadline for providing an annual gas safety record to existing tenants is 28 days from the date of the annual check. The pre-occupation requirement has no grace period. David Smith told LandlordZone that this second rule "was widely flouted." Many landlords and agents assumed that providing a GSC within 28 days of the tenancy start was enough. It was not.
In practice this means: if you served a Section 21 notice before 1 May 2026, check your files. If you cannot produce evidence that a gas safety record was given to your tenant before they moved in, your notice may be invalid. Getting this right is part of the same compliance discipline covered in our guide to business and systems for landlords.
Who is affected, and why does it still matter?
Section 21 was abolished by the Renters' Rights Act 2025, which came into force on 1 May 2026. That does not close this case. According to David Smith of Bishop & Sewell, as reported by LandlordZone, several hundred possession cases are currently stayed. Each is waiting on this outcome to determine whether notices are valid. The Negotiator separately reports that several thousand Section 21 cases are still being heard in the county courts. The two figures are consistent: hundreds of cases are formally stayed; thousands more are still working through the system.
The ruling will also continue to affect Welsh landlords. As The Negotiator reports, "Wales has and will continue to have a very similar restriction on Gas Safety Certificates for its Section 21 equivalent."
A related precedent is worth understanding. In Trecarrell House v Rouncefield, the Court of Appeal ruled on a similar but distinct scenario. Where a landlord had obtained a certificate before move-in but simply had not given it to the tenant, the omission could be remedied. Harker v Hubert goes further. The Supreme Court must now decide what happens when there is no record that a certificate existed at all at the relevant time.
If you want to understand the full range of your obligations as a landlord, the Property Filter free resources hub is a practical starting point. For landlords reviewing their overall approach in the light of compliance risk, it is worth revisiting property investment strategies with regulatory exposure in mind.
Key takeaways
• The Supreme Court has granted leave to appeal in *Harker v Hubert*, which could directly affect several hundred stayed possession cases and inform thousands of active Section 21 proceedings in England, plus equivalent no-fault cases in Wales.
• Under the Gas Safety (Installation and Use) Regulations, landlords must provide a gas safety record before a new tenant moves in. The 28-day deadline applies to annual renewals for existing tenants and is a separate, distinct requirement.
• The Court of Appeal ruled on 30 April 2026 that failure to provide a pre-occupation gas safety record permanently invalidates a Section 21 notice and cannot be corrected retrospectively.
• The key legislative change linking gas safety compliance to Section 21 was introduced by the Deregulation Act 2015, amending the Housing Act 1988.
• According to David Smith of Bishop & Sewell, landlords whose Section 21 claims have already been dismissed by a court are unlikely to benefit from a landlord-friendly Supreme Court outcome.
Frequently asked questions
Frequently asked questions
Does this case still matter now that Section 21 has been abolished?
What exactly is the pre-occupation gas safety requirement?
If the Supreme Court finds for the landlord, will dismissed claims be reopened?
What is the Deregulation Act 2015 and why does it matter here?
