Gas safety failures and the end of casual compliance

As we legal practitioners know, it is often the small details that can make or break a case. For years, many landlords and even some practitioners treated gas safety paperwork as a box-ticking exercise: important, certainly, but rarely decisive. However, recent a challenge managed by me and my team led to a Court of Appeal’s recent judgment in the linked appeals involving El Armani and Harker v Hubert has changed that landscape considerably.

The Court has now confirmed in clear terms that landlords cannot rely on a Section 21 notice where they failed to provide a valid gas safety certificate before the tenant first occupied the property. Crucially, the defect cannot simply be corrected years later by serving the latest certificate and hoping for the best.

Of course, Section 21 has now been abolished under the Renters’ Rights Act, which came into force in May, but this decision remains hugely significant. Thousands of existing possession claims are still progressing through the courts, which could mean that many more landlords may now discover that a missing document from the start of a tenancy has fundamentally compromised their claim, potentially leaving them stuck or having to go back to the starting point and even more out of pocket.

In fact, it is now possible that this is likely to become one of the most heavily litigated procedural issues in legacy possession proceedings.

What the Court Actually Decided

In a landmark judgment in the linked appeals of El Amrani v Muca and Harker v Hubert, the Court of Appeal confirmed that landlords cannot rely on a Section 21 notice where they failed to provide a valid gas safety certificate before the tenant first occupied the property.

The Court rejected arguments that this failure could later be corrected by serving updated certificates or by relying only on ongoing annual compliance. Instead, it held that the regulations impose a strict pre-condition to the use of the Section 21 procedure, intended to ensure tenants receive critical safety information at the very start of the tenancy. The ruling makes clear that late compliance is not enough and that a failure at the outset can permanently invalidate a landlord’s ability to use the Section 21 process in relation to that tenancy.

The judgment draws an important distinction between two separate obligations in respect of gas safety certificates.

The first is the pre-occupation requirement. Before a tenant moves into a property, the landlord must ensure that a valid gas safety certificate exists and that it is provided to the tenant before they move in.

The second is the ongoing obligation to carry out annual gas safety inspections and provide updated records during the tenancy itself.

The Court of Appeal made clear that these are not interchangeable obligations. Compliance with later annual checks does not cure a failure to comply at the outset of the tenancy. The legislation, the Court said, was designed to operate as a “spur to compliance” with essential safety obligations.

That wording matters. The Court was signalling that gas safety requirements are not merely administrative hurdles. They are substantive protections intended to safeguard tenants from potentially catastrophic risks.

The Practical Problem Facing Landlords

The difficulty for many landlords is that the relevant evidence may date back years.

In some cases, the tenancy began under a previous managing agent. In others, documents were served informally, verbally referenced, uploaded to a portal with no audit trail, or simply lost altogether. Some landlords may genuinely believe they complied but now find themselves unable to prove it.

That distinction is critical. In possession proceedings, landlords cannot merely get away by saying a certificate was served — they will need to provide evidence that it happened.

Practitioners acting for landlords should therefore be carrying out immediate audits of every live or anticipated Section 21 claim. The key questions include:

• Was a valid gas safety certificate in existence before occupation?

• Was it actually provided to the tenant before move-in?

• Is there documentary evidence of service?

• Was the certificate attached to tenancy paperwork?

• Are there emails, signed acknowledgments?

• Was the tenancy inherited from another agent or landlord?

• Are there gaps in the documentation chain?

Pre-Occupation Compliance vs Ongoing Compliance The distinction pre-occupation compliance and ongoing compliance will now be central to almost every legacy Section 21 case.

The pre-occupation obligation is front-loaded. The certificate must exist and be served before the tenancy begins. If that did not happen, the defect may now be fatal to a Section 21 claim altogether.

The ongoing obligation is different. Landlords remain under a continuing duty to carry out annual gas safety inspections and provide updated certificates during the tenancy. Failures here can still have serious consequences, but the Court’s judgment makes clear that the initial pre-occupation step occupies a unique legal position.

Implications for practitioners

For practitioners, the evidential issue is likely to be the battleground. What actually proves service?

Signed tenancy packs remain the safest evidence. Email trails can assist, particularly where any attachments are clearly identifiable. Some agents may have electronic portal records showing when documents were uploaded and accessed. Witness evidence may assist, but many courts are likely to expect contemporaneous documentary records wherever possible.

Advice for Solicitors Handling Live Claims Claimant solicitors should now be reviewing files with extreme care. It is no longer safe to assume that possession proceedings are viable simply because annual gas certificates exist somewhere within the landlord’s records.

If there is uncertainty over pre-occupation service, practitioners should identify the risk early and advise frankly on the consequences. Proceeding with a weak claim may expose landlords to adverse costs, delay and could attract claims that the proceedings were frivolous and should never have been pursued in the first place.

Defendant solicitors, meanwhile, are likely to scrutinise compliance histories far more aggressively. Requests for disclosure concerning historic certificates and evidence of service are likely to become routine.

In practical terms, this issue may now appear in almost every defended legacy Section 21 matter.

Transitional Risks After the Renters’ Rights Act Some landlords may assume this decision has limited relevance now that Section 21 has been scrapped. However, that would be a mistake.

A substantial number of claims remain within the court system and given the widespread delays to almost all case, these are likely to continue to be litigated for some time. Many notices were served before the legislative changes came into force in May, meaning the courts are likely to face a prolonged wave of challenges centred on compliance failures.

Older tenancies are particularly vulnerable. Informal management arrangements, missing paperwork, changes in agents and poor record retention all create obvious risks.

The irony is that the abolition of Section 21 may actually intensify scrutiny of the final generation of claims as parties fight over possession proceedings already in progress.

The Bigger Message from the Courts

This judgment reflects a wider trend in housing litigation with courts now increasingly unwilling to treat regulatory obligations as mere technicalities, particularly where safety is concerned.

Landlords and practitioners alike are now expected to demonstrate rigorous compliance, supported by proper records and evidence. Good record-keeping is no longer simply administrative good practice; it has become a core litigation strategy.

The era of casual compliance is over.

For years, missing gas safety paperwork was often viewed as an inconvenience capable of being corrected later. Following this judgment, it may instead be the issue that determines whether a possession claim succeeds or fails altogether.