Kyri Lefteri

BarristerCall 2006

Kyri has a specialist family practice with particular emphasis on children work. He successfully undertook his pupillage at New Court Chambers in 2006 and has since become an integral and respected member of Chambers.

Kyri has experience in all aspects of children law, including Public and Private law proceedings, Adoption and Child Abduction. He is regularly instructed in lengthy finding of fact hearings, final hearings and appeals, together with interim hearings and interlocutory applications.

Kyri also represents clients in international family law cases and has appeared in the High Court in child abduction matters. An increasing proportion of Kyri’s practice relates to jurisdictional disputes in Family Law cases, including acting for clients who reside overseas.

Kyri’s practice also includes Ancillary/Financial Relief and Family Law Injunctions.

He regularly supports training events and seminars for his clients and is keen to discuss any particular training needs his clients may have.

LLB (Hons) University College London

BVC City Law School (ICSL)

Re S (Withholding Evidence) [2022] EWFC 76

Re I [2020] EWCA Civ 281

Re S (A Child) [2017] EWCA Civ 249

Re P [2016] EWHC 1170 (fam)

Redbridge v SNA [2015] EWHC 2140 (fam)

P (A Child: Use of s.20 CA 1989) [2014] EWFC 775

Re SJ (A Child) [2011] EWHC 473 (Fam)

Family Law Bar Association

Inner Temple

Modern Greek (Fluent).

Kyri is a keen footballer and plays regularly. Kyri also enjoys cycling and attending the gym.

“Kyri Lefteri is a really strong public law practitioner who shows real commitment to his clients. He has a fluent style of advocacy and can handle cases where difficult issues arise.”

“An incredibly thorough, good, incisive cross-examiner, whose knowledge of his cases is second to none.”

“Kyri’s cross-examination is always on-point and his advocacy is lethal in its focus.”

Chambers & Partners 2024

‘Kyri is tenacious, clearly reads the papers well and prepares for cases meticulously. His advocacy is clear and forthright.’

Legal 500 2024

“He’s an excellent advocate who is a pleasure to work with and very good at non-accidental injury cases.”

“A personable, strong and highly capable advocate who approaches cases in a pragmatic fashion.”

Chambers & Partners 2023

A specialist children lawyer, who appears at all levels of tribunal up to the Court of Appeal. He represents local authorities, parents, guardians, children, and other family members, and further handles private law and abduction proceedings, some of which are international in scope.

“An able advocate who handles complex borderline care cases and historic sex abuse allegations.”

“No case is too difficult for him.”

Chambers & Partners 2022

A specialist children lawyer, who appears at all levels of tribunal up to the Court of Appeal. He represents local authorities, parents, guardians, children and other family members, and further handles private law and abduction proceedings, some of which are international in scope.

“His professionalism, the quality of his research and his advocacy skills all impress.”

“He approaches his cases with vigour even when appearing in front of the most difficult judges.”

Chambers & Partners 2021



Data Controller

I am registered with the Information Commissioner’s Office (ICO) as a Data Controller for the personal data that I hold and process as a barrister. My registered address is New Court Chambers, Temple, London EC4Y 9BE and my registration number is Z9811800.


Data Collection

All of the information that I hold about you is provided to or gathered by us in the course of your case and/or proceedings. Your solicitor and I will tell you why we need the information and how we will use it.


Lawful Basis for processing your information

The General Data Protection Regulation (GDPR) requires all organisations / individuals that process personal data to have a Lawful Basis for doing so. The Lawful Bases identified in the GDPR are:

·      Consent of the data subject
·      Performance of a contract with the data subject or to take steps to enter into a contract
·      Compliance with a legal obligation
·      To protect the vital interests of a data subject or another person
·      Performance of a task carried out in the public interest or in the exercise of official authority vested in the controller.
·      The legitimate interests of ourselves, or a third party, except where such interests are overridden by the interests, rights or freedoms of the data subject.


Examples of legitimate interests include:

  • Where the data subject is a client or in the service of the controller;
  • Transmission within a group of undertakings for internal administrative purposes;
  • Processing necessary to ensure network and information security, including preventing unauthorised access;
  • Processing for direct marketing purposes, or to prevent fraud; and
  • Reporting possible criminal acts or threats to public security.


My Lawful Basis is:

·      Your consent
·      To protect the vital interests of a data subject or another person
·      Compliance with a legal obligation


My Legitimate Interest is:

·      You are a client
·      The processing is necessary for administering justice
·      The processing is necessary in relation to legal proceedings, for obtaining legal advice, or otherwise for establishing, exercising or defending legal rights

I use your information to:

  • Provide legal advice and representation
  • Communicate with you about services, updates and events


I do not use automated decision-making in the processing of your personal data.


I collect and process both personal data and special categories of personal data as defined in the GDPR. This includes:


Client data

  • Name;
  • Email;
  • Phone number;
  • Address;
  • Date of birth;
  • Location details;
  • Medical history and current medical health;
  • Criminal convictions;
  • Social work involvement;
  • Ethnic origin;
  • Religious background.


I may share your personal data with:

  • Instructing solicitors;
  • Pupil or mini pupil, under my training;
  • Opposing Counsel, for the purposes of resolving the case;
  • My Chambers management and staff who provide administrative services;
  • My regulator or legal advisors in the event of a dispute or other legal matter;
  • Law enforcement officials, government authorities, or other third parties to meet our legal obligations;
  • Any other party where I ask you and your consent to the sharing.


Transfers to third countries and international organisations

I store my case files on Microsoft One Drive which is a cloud hosted environment.

I am satisfied that such transferred data is fully protected and safeguarded as required by the General Data Protection Regulation.


Retention of data

I retain your personal data while you remain a client unless you ask me to delete it.


My Retention and Disposal Policy (copy available on request) details how long I hold data for and how I dispose of it when it no longer needs to be held. I will delete or anonymise your information at your request unless:

  • There is an unresolved issue, such as claim or dispute;
  • I am legally required to; or
  • There are overriding legitimate business interests, including but not limited to fraud prevention and protecting customers’ safety and security.


Your Rights

The General Data Protection Regulation gives you specific rights around your personal data. For example, you have to be informed about the information I hold and what I use it for, you can ask for a copy of the personal information I hold about you, you can ask us to correct any inaccuracies with the personal data I hold, you can ask us to stop sending you direct mail, or emails, or in some circumstances ask us to stop processing your details. Finally, if I do something irregular or improper with your personal data you can seek compensation for any distress you are caused or loss you have incurred. You can find out more information from the ICO’s website and this is the organisation that you can complain to if you are unhappy with how I dealt with you.

Accessing and Correcting Your Information

You may request access to, correction of, or a copy of your information by contacting me at


I will occasionally update my Privacy Notice. When I make significant changes, I will notify you of these by email. I will also publish the updated Notice on my website profile.



Data Protection Policy available on request.