An analysis of A v Z [2026] EWHC 654 (Fam) about settlement follow pre-nuptial agreement
High Court (Family Division) — Prenuptial agreements, fairness, and “gap-filling” powers

This is a modern nuptial agreement case dealing with a subtle but important issue:
What happens where a prenuptial agreement is otherwise upheld, but is silent on the mechanics needed to implement it fairly?
Core Issue
The court had to decide:
- The parties had a binding (or weighty) prenuptial agreement
- The agreement determined the broad division of assets
- BUT it lacked a buy-out mechanism where:
- assets were jointly held or intertwined
Question:
Can the court order a compensatory payment to make the agreement work?
Key Holding
The court upheld the
substance of the prenuptial agreement
BUT went further and:
Ordered a compensatory payment (buy-out type adjustment)
even though:
The agreement did not expressly provide for it
Legal Principle
The case establishes:
The court may supplement (but not rewrite) a nuptial agreement where necessary to achieve a fair and workable outcome.
Legal Framework
The court applied the modern nuptial agreement approach from:
- Radmacher v Granatino
Key rule:
Give effect to a nuptial agreement unless it would be unfair to do so
The Critical Distinction
This case turns on a subtle but crucial distinction:
What the court can do
What it cannot do
Fill in gaps
Rewrite the agreement
Implement intention
Override core terms
Ensure fairness
Replace the bargain
Why the Agreement Needed “Supplementing”
The agreement:
- Allocated separate property shares
- Likely assumed:
- clean separation
- BUT did not deal with:
How to unwind shared ownership structures
Problem created:
- One party could not exit without:
- sale
- transfer
- compensation
Without court intervention:
The agreement would be impractical or unfair
Court’s Reasoning
A. Upholding autonomy
The court respected:
- the parties’ agreement
- their allocation of property
B. Ensuring functionality
The court recognised:
An agreement must be capable of being implemented in reality
C. Fairness overlay
The key test:
Does the overall outcome remain fair?
Not:
- whether every step is written in the agreement
D. Clean break objective
The court aimed to:
Achieve a clean break
This justified:
- ordering a payment to enable separation
Nature of the Payment
The payment was:
- compensatory / balancing
- not redistributive in the sharing sense
It was designed to:
- reflect value transferred or foregone
- enable exit from shared assets
Relationship with Wider Law
This case develops the Radmacher line by clarifying:
Nuptial agreements are:
- influential
- but not self-executing
The court retains:
implementation jurisdiction
to ensure:
- fairness
- practicality
Key Principle Emerging
The court may “engineer” the outcome necessary to give effect to the agreement, provided it does not undermine its substance.
Practical Implications
For drafting prenups
Critical lesson:
ALWAYS include:
- buy-out provisions
- valuation mechanisms
- exit routes
For litigation
Where agreement is silent:
Seek:
- balancing payments
- structuring orders
For advising clients
Explain:
- agreement ≠ automatic outcome
- court may still:
- adjust mechanics
- impose payments
Strategic Importance
This case is particularly useful where:
- one party argues:
- “the agreement says nothing about payment”
Response:
The court can still order one if necessary to implement fairness.
Key Takeaways
- Prenups are respected but not rigid
- Courts can fill gaps to make them work
- Clean break is a strong driver
- Fairness is assessed holistically
Bottom Line
A v Z [2026] EWHC 654 (Fam) confirms:
Even where a prenuptial agreement governs the division of assets, the court can order compensatory payments to implement it fairly and achieve a clean break, where the agreement itself is silent on mechanics.
Final Insight
This is a maturing of nuptial agreement jurisprudence:
From:
- “Are they binding?”
To:
- “How do we make them actually work in real-world asset structures?”
For divorce law advice and divorce court representation contact Stephanie Heijdra divorce lawyer via sheijdra[@]winvolvedlegal.co.uk
Read the full judgment here




