David  Jeffery

David Jeffery  

Senior Associate* | Guernsey | BVI

Private Client and Trusts

  • David Jeffery has been outstanding professionally and a fantastic support. He has shown true compassion and understanding.
    Client feedback
  • I would highly recommend David to anyone in the future!
    Client feedback
  • Friendly and easy to deal with.
    Client feedback
  • Tactically astute, someone you want on your side.
    Client feedback


David is a Senior Associate in our Guernsey dispute resolution team, with over 15 years' experience of general litigation, with a particular focus on contentious wills and estates, as well as high value personal injury and complex medical negligence actions.

David advises on all aspects of contentious wills and estates matters, including claims for financial provision under the Inheritance (Guernsey) Law, 2011, challenges to the validity of a Will on the grounds of undue influence, lack of testamentary capacity and want of knowledge and approval, and also contested executorship applications.

His personal injury and medical negligence practice sees him accept instructions from both Plaintiffs and Defendants, and has represented some of the largest insurers in the UK. He has a particular focus on high-value RTAs, complex brain injury and birth defect/traumatic birth cases.

David is also admitted as solicitor of the Eastern Caribbean Supreme Court in the territory of the Virgin Islands, where he has been heavily involved in providing assistance to our BVI Dispute Resolution Team in a number of significant medical negligence cases being litigated in the BVI High Court.

"A lawyer who knows how to win."


Obtained significant damages for multiple Plaintiffs injured in RTAs on Guernsey's roads.

Won six-figure damages for a Plaintiff following a lifting type accident at work.

Obtained damages in excess of £500,000 for a labourer who sustained brain injuries following a fall from height at work.

Successfully litigated the first case to come before the Royal Court of Guernsey alleging 'undue influence' in respect of a lifetime transfer [see Hitchins v Hill, 2011].

Defended a widow against allegation of undue influence and lack of capacity concerning her late husband's Will.

David is one of Collas Crill's most experienced 'mediators', having appeared for clients at mediation many times, in multiple jurisdictions, in both contested probate and medical negligence actions.



David graduated from the University of Nottingham Trent and completed the Legal Practice Course at the College of Law, Guildford. He went on to train with leading regional firm, Thomson Snell & Passmore, qualifying as a solicitor of England & Wales in 2004. During his training, David undertook extended seats in the firm's complex medical negligence and brain injury team.

David is also admitted as solicitor of the Eastern Caribbean Supreme Court in the territory of the Virgin Islands.

In his spare time, David is an avid golfer playing off a handicap of 1. He is a Past Captain and Past President of his golf club.


APIL (Association of Personal Injury Lawyers)

*admitted in England and Wales, and British Virgin Islands

*Business Assistant
Katie Martin

Katie Martin

My services
International arbitration and mediation

With offices in the British Virgin Islands, the Cayman Islands, Guernsey, Jersey and London, we can advise you on every aspect of international arbitration. Our dedicated arbitration specialists will work alongside you to quickly determine the best approach for a successful conclusion.

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Real estate disputes

Our experienced team represent clients in a range of private, contractual and commercial real estate disputes. 

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Wills and estate disputes

We provide fast, cost-effective and sensitive advice on all types of will-related disputes during what is often an extremely upsetting and distressing time for those concerned. We regularly act on multi-party actions for both plaintiffs and defendants.

Wills and estates

Managing wealth, asset preservation, planning for succession and inheritance, and writing wills can be a complex and difficult experience. It's important to ensure that your assets are distributed according to your wishes and that your family and/or successors are taken care of.

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4 Apr 2023

Undue influence will overturned

A pair of mutual Wills drafted by a couple in 1998 have been overturned by the High Court of England and Wales following a claim of undue influence by one of their sons in Naidoo v Barton, 2023 EWHC 500 Ch. The Wills, made by Dr Govindarajaloo Ramamurth...

17 Mar 2023

Challenging inheritance claims

In a recent UK inheritance claim case (Fennessy v Turner & anr [2022] WTLR 1295), an adult child won an inheritance claim against his mother's estate. The disabled son won £195,000 from his late mother’s estate after being left out of her Will. The e...

9 Jun 2021

Contentious probate case summary

Claim In the case of Mundil-Williams v Williams [2021] John Williams was a divorced Welsh farmer with four sons. In 2014, he executed a Will (2014 Will). The 2014 Will left his interest in the farm to his eldest son, Richard. The Claimant, a son of the d...

29 Mar 2021

A question of domicile

The judge was recently asked to determine the domicile of the late Mr Neil Corner (deceased) following his death in Guernsey in 2017. By his will, Mr Corner appointed Mr O'Connor as his executor. Mr O'Connor sought a declaration as to Mr Corner's domici...

7 Jun 2019

Settling the 'score'

A recent decision of the Court of Appeal serves to provide employers with a useful reminder of the importance of the duties that they owe to their employees and the consequences of failing to successfully discharge them. The English Decision The Court ...

8 Apr 2019

Personal injury claim changes

In a recent meeting of the States of Guernsey, the assembly was asked to consider the content of a new Policy Letter regarding the method of payment of damages following personal injury claims. At present, the system sees injured parties compensated for ...

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