Form 6A (Section 21 Notice)

Notice to Quit

A common-law notice ending a contractual periodic tenancy (rather than a statutorily protected one). For most modern residential lets governed by the Housing Act 1988 the relevant notices are Section 21 (until 1 May 2026) and Section 8 (Form 3A) under the assured shorthold / assured periodic tenancy regime, not a common-law Notice to Quit. The phrase is still used colloquially and remains relevant for specific edge cases: company lets, resident landlords, holiday lets and tenancies excluded from the Housing Act 1988 by Schedule 1.

Fixed-Term Tenancy

A tenancy granted for a set period, such as 6 or 12 months, historically the standard form of assured shorthold tenancy. The Renters’ Rights Act 2025 abolished fixed terms for most residential tenancies from 1 May 2026: new tenancies are periodic from the start and a tenant can end them with two months’ notice at any time.

Form 3A (Notice of Seeking Possession, Section 8)

The prescribed form a private landlord uses to start a Section 8 possession claim under the Housing Act 1988. GOV.UK publishes two versions: Form 3A for the private rented sector and Form 3 for social housing, so a private landlord who serves Form 3 has used the wrong form. It identifies the tenancy, the grounds being relied on (from Schedule 2 to the Housing Act 1988) and the date by which the tenant must give up possession. Notice periods vary by ground: no minimum notice for grounds 7A and 14 (anti-social behaviour), 4 weeks for ground 8 (rent arrears), 4 months for ground 1A (landlord sale) post-RRA 2025. A defective notice — wrong form, wrong ground, wrong notice period, missing prescribed wording — is the most common reason possession claims fail at first hearing.

Form N5B (Accelerated Possession Claim)

The court form historically used to start an accelerated possession claim after a valid Section 21 notice. The accelerated route allowed possession on paper without a hearing in straightforward cases. From 1 May 2026 the form is no longer usable for new claims because Section 21 has been abolished by the Renters Rights Act 2025; possession claims now start under Section 8 / Form N5 instead.

AST (Assured Shorthold Tenancy)

The most common form of private tenancy in England. From 1 May 2026 all existing ASTs converted to assured periodic tenancies under the Renters Rights Act 2025, and new fixed-term ASTs can no longer be created for most residential lets.

Disrepair

A property condition falling below the landlord’s repairing obligations under Section 11 of the Landlord and Tenant Act 1985 or the Homes (Fitness for Human Habitation) Act 2018. Tenants can sue for damages and specific performance. Disrepair is not in itself a defence to a possession claim, but a damages counterclaim can be set off against rent arrears — which can drop the arrears below the Ground 8 threshold — and it weighs against the landlord on the reasonableness test for discretionary grounds.