Siân Cox

Call: 2008

"Sian is a dedicated family lawyer and a conscientious, safe pair of hands whoever she is representing."

Sian is an experienced barrister, with a practice covering public and private children cases and family finance. She is a highly persuasive and effective advocate. Her clients find her to be a sympathetic advocate, one who understands the importance of building a strong rapport with clients in order to make difficult circumstances feel more tolerable. She has considerable legal knowledge and courtroom skills, which she deploys to achieve the best results for her clients.

Sian was called to the Bar in 2008 and became a tenant at Harcourt Chambers in 2009 after successfully completing her pupillage there.

To instruct Siân or for more information…

Call: 020 7353 6961

Practice Areas

Sian has extensive experience of representing all parties in public law proceedings, including those assisted by the official solicitor or intermediaries. Her practice covers the whole scope of public law, including highly complex medical cases. Sian has a thorough and pragmatic approach to case management in the early stages and is particularly effective in cross-examination and trial advocacy.

Notable Public Law Children cases

Re N(Children: Findings Against a Professional Witness: Joinder or Intervention) [2024] EWFC 17

Care proceedings. Judgment considering the position of medical expert who the local authority asserted had been manipulated by the mother.

LA v X & Ors [2018] EWHC 1116 (Fam)

Sian has represented parents and children in a wide variety of private law cases. She has considerable experience of disputes concerning applications for child arrangements orders, and more specialist areas such as removal of parental responsibility and internal and international relocation. Sian has a reputation for being able to establish a rapport with a wide range of clients, from the very vulnerable to highly successful professionals. Her flexible and adaptable approach enables her to achieve positive outcomes for clients.

Notable Private Law Children cases

F v M & Ors [2023] EWFC 172

Sian Cox represented the mother in complex and lengthy private law proceedings. This judgment follows on from the fact finding judgment [2022] EWFC 124, in which she also appeared and a number of serious findings of coercive and controlling behaviour were made against the father. At the final hearing, Sian was able to secure significant protective orders for the mother, including lengthy s91A, restriction of parental rights, prohibited steps, and non-molestation orders. This case also posed difficult jurisdictional and procedural issues, which arose at a late stage when the father did not return to the UK for the final hearing.

F v M & Ors [2022] EWFC 124

Fact-finding hearing to deal with allegations made by both parties, in the context of Children Act and Family Law Act proceedings.

PM v CF [2018] EWHC 2658 (Fam)

Sian is qualified to accept instructions directly from members of the public under the Direct Access Scheme in appropriate circumstances.

Related News

Sian Cox: Transparency in the Family Court: Private Children Update Q&A


Following the launch of the Reporting Pilot in January 2023 in Cardiff, Leeds and Carlisle, January 2024 sees the expansion of the children pilot to the following courts:North: Liverpool,…

Nick Goodwin KC and Sian Cox represented the Local Authority in the case of Re N(Children: Findings Against a Professional Witness: Joinder or Intervention) [2024] EWFC 17

These proceedings concern two children who are the subject of public law applications brought by the local authority. The allegations made are that the two children have suffered significant harm…

Sian Cox in F v M & Ors [2023] EWFC 172

Sian Cox, instructed by BP Collins LLP, represented the first respondent Mother in F v M & Ors [2023] EWFC 172  complex and lengthy private law proceedings. This judgment follows on from the…


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