"A brilliant advocate at the top of her game."
Helen is a versatile practitioner with a wide ranging and successful practice. She is an ‘engaging’, ‘fearless and tactical advocate’, ‘a fantastically good analytical lawyer’ ‘creative in her arguments’ with ‘an impressive ability to articulate very difficult arguments’ who combines and ‘a clear forensic style’ with ‘an understanding and empathetic approach to clients’ and ‘clear and tactical advice’ (Chambers & Partners 2015). The Legal 500 says she is ‘accessible, hardworking and handles a remarkable range of work with skill and panache’. It adds: ‘Courts respect her, clients love her; opponents are in awe of her’ and that she is ‘outstanding on her feet’.
She is consistently listed in the Legal 500 and Chambers directories, in Administrative & Public Law; Human Rights and Civil Liberties; Education; Local Government; Elections and Employment law. Helen was Chambers & Partners’ Public Law and Human Rights Junior of the Year in 2009; shortlisted for Legal 500 Public Law Silk of the Year 2015; shortlisted as Barrister of the Year by The Lawyer Magazine in 2010 and in the Lawyer’s “Hot 100” Lawyers for 2011. Helen won Public Law KC of the year at the Legal 500 Bar Awards 2022-2023.
In 2015-2016, Helen appeared in the Supreme Court seven times, including for the winning parties in Miller v Secretary of State for Exiting the EU.
Helen is on the Equality & Human Rights Commission’s panel, and was on the Treasury A Panel before taking silk. She is a special advocate, and sits as a Deputy High Court Judge in the Administrative Court and as a civil and criminal recorder. She is also a qualified mediator, and a member of the Council of Justice. She is a Master of the Bench of Gray’s Inn.
As a highly regarded public law specialist, Helen has appeared in many significant cases.
Particular areas of expertise include regulatory work, equality law, terrorism and national security, education law, social welfare and election law.
Helen is particularly well-known for cases concerning discrimination and equality questions as they arise in public law, employment, commercial and other contexts.
She is also one of the few practitioners at the Bar with frequent election law experience.
She has also written an article entitled “Regulatory Expropriations in Europe: the Approach of the European Court of Human Rights” 11 New York University Environmental Law Journal 136 (2002-2003).
Helen’s expertise in equality law covers a variety of fields. She has particular expertise in public sector equality duties, and the interaction of European and international law and domestic employment law.
Recent and notable cases include:
For a list of Helen’s Employment and Discrimination cases, please see here.
Helen is one of the very few practitioners at the Bar with extensive experience of election law, a field in which she has practised for over 20 years. She has represented and advised three major political parties, registration and returning officers, and advised the Electoral Commission, private companies and civil society groups on the demands of election law.
Helen has extensive election petition experience, including two Parliamentary election petitions.
Recent and notable cases include:
Helen represented the successful petitioner in Watkins v Woolas, in which the Oldham East and Saddleworth general election result in 2010 was set aside using section 106 Representation of the People Act 1983 (a result which was upheld in the Divisional Court in R (Woolas) v Parliamentary Election Court). This was the first successful use of section 106 in a general election petition for a century.
She represented the Equality & Human Rights Commission in its intervention in Greens & Anor v UK (2010) in the European Court of Human Rights. This was part of the ‘prisoners’ voting’ litigation. The ECtHR found a violation of art 3 of Protocol No. 1 (right to free elections) to the ECHR and no violation of ECHR, art 13 (right to an effective remedy) as to the continuing failure to amend the legislation imposing a blanket ban on voting in national and European elections for convicted prisoners in detention in the UK.
She has also appeared in numerous other general and local election petitions, including the Winchester General Election Petition in 1997, the Bordesley Green election petition (in which she represented the successful petitioners) and Knight v Nicholls (2003) in which the applicant sought a determination that the election in Belle Vale & Halsbury was void due to undelivered postal ballot papers.
Helen has a wide-ranging administrative law practice. Issues of human rights, discrimination and EU law intersect across her whole practice. She works collaboratively with solicitors and clients, so that advice and, if appropriate, litigation, meet the client’s strategic objectives. She is happy to discuss a case ahead of instructions and is a qualified mediator.
Recent and notable cases include:
For a list of Helen’s Administrative and Public Law cases, please see here.
Helen acts both for individual and corporate claimants and for a wide range of public authorities. She is on the Equality & Human Rights Commission’s panel of preferred counsel, and acts as a special advocate.
Public authorities and regulatory bodies which she has represented or advised include the EHRC, the Information Commissioner, the Office of Rail Regulation, the Electoral Commission, the Lord Chancellor, Ofsted, Ofqual, the GMC and the Law Society. She has also represented blue chip companies in successful public law challenges.
Before taking silk Helen was Chambers & Partners’ Public Law and Human Rights Junior of the Year 2009 and a member of the Treasury A Panel. Since 2013, she sits part-time as a Deputy High Court Judge in the Administrative Court.
Helen is committed to protecting and respecting your privacy. In order to provide legal services to her clients, including advice and representation services, Helen needs to collect and hold personal data. This includes her client’s personal data and the personal data of others who feature in the matter upon which she is instructed. To read Helen’s privacy notice in full, please see here.
This year the Legal 500 says ‘courts respect her; clients love her; opponents are in awe of her’. She has also been described as ‘accessible, hardworking and handles a remarkable range of work with skill and panache’ (Legal 500); an ‘impressive’, ‘engaging’, ‘fearless and tactical advocate’, who combines creative arguments, a clear forensic style and an understanding and empathetic approach to clients (Chambers & Partners).
"Helen is brilliant in the space where public law touches equality law."
"Absolutely brilliant. A very clear advocate with deep understanding of human rights principles."
"Helen is very smart."
"Helen provides authoritative advice on complex Equality Act issues which are at the forefront of public discussion. Her careful analysis enables instructing solicitors and their clients to manage some very sensitive issues."
"Helen is a go-to silk on complex equality law issues, and her high-level, strategic advice on significant matters is invaluable." "Helen cuts through a myriad of complex legislative considerations to provide navigable solutions to clients' problems."
"Helen is an incisive silk, with very strong emotional intelligence and client management skills."
"Helen is a legal artist with a brilliant mind. She offers the instructing solicitor crystal-clear analysis and unparalleled advocacy."
"She is brilliant in court." "Helen has first-class knowledge of public law and excellent judgement."
"A brilliant advocate who is at the top of her game." "Helen has led a number of leading human rights cases; she is brilliant in court."
"Helen is a brilliant advocate."
"Helen is a prominent, go-to barrister for education matters."
"A very smart and highly capable and creative advocate."
"Exceptionally smart, very knowledgeable and has excellent judgement."
"'Helen is hard-working, responsive and an excellent advocate."
"Helen is very bright, hard working, possesses good judgement and is very easy to get on with. She is a delight to work with and produces a first class work product."
“Helen is a star and deals with specific election law issues very well.” “Very capable and very good with clients, she goes the extra mile and is very dedicated.”
"Helen is an incredibly nice opponent who takes on difficult cases and achieves significant results."
"She is really excellent."
"Still doing groundbreaking work and very much a leading public lawyer."
"Really outstanding to work with. A go-to public law silk."
Top class, she's both extremely intelligent and hugely practical." "She's a good communicator who is exceptionally knowledgeable and good with clients.
She fights hard for her clients but is a lovely opponent.
She is clearly one of the leading silks at the Bar.
Very approachable and really good to work with." "She is phenomenally intelligent.
A good advocate who is known for being involved in high-profile matters - she uses her broad experience to bring a different perspective to cases." "She's intelligent, committed, hard-working and very good with clients.
She is super bright, down to earth and always gets straight to the heart the matter." "A no-nonsense, highly intelligent advocate.
She did an absolutely first-class job, and was excellent at deciding which points to respond to in order to argue the case in its strongest form.
Immensely experienced.
She is firm, highly skilled in the law, and capable of bringing together a range of opinions from practitioners who themselves have had years of experience.
An incisive legal mind who is very experienced in equality law and human rights.
She is extremely bright and very able, and can construct extremely effective and persuasive argument. She is much liked by clients for her keen, unstinting approach, and her empathy, and her willingness always to go the extra mile.
She has a brain the size of a planet and is a fabulous advocate. Simply superb to work with.
A highly experienced silk.
Excellent on EU law issues, she is willing to pitch in.
The range of her practice is incredible – but not at the expense of her grasp of detail.
Intellectually rigorous, with clarity of expression.
Unflappable silk with exceptional knowledge of the area.
She's very, very clever and is excellent both on paper and on her feet." "She's personable, immensely bright and fantastically persuasive." "She combines excellent technical skills with a grounded, practical approach, and never loses sight of the big picture.
Has an incredible reputation and a very wide-ranging practice. She has been at the forefront of many areas of law and is a measured and authoritative advocate." "She knows what will and won't fly with the court and gets good results.
Very intelligent, committed, hard-working and very good with clients," she is "a pragmatic performer" who is "bright, charming and a delightful person to work with.
An incredibly elegant advocate; she is really persuasive and can articulate beautifully." "One of the leading practitioners on issues involving human rights and the Equality Act. She's a very impressive advocate.
She's reliable, clear-thinking and collegiate in her approach. She understands completely what we need and her work is always high quality.
One of the leading lights in equality law and human rights. She's very nice to work with, very bright, and good at knowing what will and won't fly with the courts." "She's reliable, clear thinking and collegiate.
An extraordinary silk. One thing that's very impressive is the degree to which she'll contribute throughout the litigation as a thoughtful participant." "One of the leading lights in equality, human rights and public law. She's very nice to work with, very bright, and good at knowing what will and won't fly with the courts. She gets good results and really cares about her clients." "Helen is calm and measured. She took good tactical decisions and made the case seem very simple.
She is brilliant on human rights and equalities arguments, and always has the ear of the court.
She is very bright, highly analytical and attentive, and particularly experienced in this area of law.
She is the pre-eminent education silk in cases involving equality and human rights.
Brilliant on human rights and equalities arguments, and she always has the ear of the court.
She is very well respected on the circuit." "Helen does very good work.
Pre-eminent in judicial review claims founded in discrimination enactments, and has a depth of knowledge and clarity of exposition that makes her an obvious first choice." "Brilliant on human rights and equalities arguments, she always has the ear of the court..
"A brilliant advocate at the top of her game."
Chambers & Partners 2023
Contact Helen: helenmountfield@matrixlaw.co.uk | +44 (0)20 7404 3447
Contact Helen's Practice Team (Team X): TeamX@matrixlaw.co.uk
Helen is a versatile practitioner with a wide ranging and successful practice. She is an ‘engaging’, ‘fearless and tactical advocate’, ‘a fantastically good analytical lawyer’ ‘creative in her arguments’ with ‘an impressive ability to articulate very difficult arguments’ who combines and ‘a clear forensic style’ with ‘an understanding and empathetic approach to clients’ and ‘clear and tactical advice’ (Chambers & Partners 2015). The Legal 500 says she is ‘accessible, hardworking and handles a remarkable range of work with skill and panache’. It adds: ‘Courts respect her, clients love her; opponents are in awe of her’ and that she is ‘outstanding on her feet’.
She is consistently listed in the Legal 500 and Chambers directories, in Administrative & Public Law; Human Rights and Civil Liberties; Education; Local Government; Elections and Employment law. Helen was Chambers & Partners’ Public Law and Human Rights Junior of the Year in 2009; shortlisted for Legal 500 Public Law Silk of the Year 2015; shortlisted as Barrister of the Year by The Lawyer Magazine in 2010 and in the Lawyer’s “Hot 100” Lawyers for 2011. Helen won Public Law KC of the year at the Legal 500 Bar Awards 2022-2023.
In 2015-2016, Helen appeared in the Supreme Court seven times, including for the winning parties in Miller v Secretary of State for Exiting the EU.
Helen is on the Equality & Human Rights Commission’s panel, and was on the Treasury A Panel before taking silk. She is a special advocate, and sits as a Deputy High Court Judge in the Administrative Court and as a civil and criminal recorder. She is also a qualified mediator, and a member of the Council of Justice. She is a Master of the Bench of Gray’s Inn.
As a highly regarded public law specialist, Helen has appeared in many significant cases.
Particular areas of expertise include regulatory work, equality law, terrorism and national security, education law, social welfare and election law.
Helen is particularly well-known for cases concerning discrimination and equality questions as they arise in public law, employment, commercial and other contexts.
She is also one of the few practitioners at the Bar with frequent election law experience.
She has also written an article entitled “Regulatory Expropriations in Europe: the Approach of the European Court of Human Rights” 11 New York University Environmental Law Journal 136 (2002-2003).
Helen’s expertise in equality law covers a variety of fields. She has particular expertise in public sector equality duties, and the interaction of European and international law and domestic employment law.
Recent and notable cases include:
For a list of Helen’s Employment and Discrimination cases, please see here.
Helen is one of the very few practitioners at the Bar with extensive experience of election law, a field in which she has practised for over 20 years. She has represented and advised three major political parties, registration and returning officers, and advised the Electoral Commission, private companies and civil society groups on the demands of election law.
Helen has extensive election petition experience, including two Parliamentary election petitions.
Recent and notable cases include:
Helen represented the successful petitioner in Watkins v Woolas, in which the Oldham East and Saddleworth general election result in 2010 was set aside using section 106 Representation of the People Act 1983 (a result which was upheld in the Divisional Court in R (Woolas) v Parliamentary Election Court). This was the first successful use of section 106 in a general election petition for a century.
She represented the Equality & Human Rights Commission in its intervention in Greens & Anor v UK (2010) in the European Court of Human Rights. This was part of the ‘prisoners’ voting’ litigation. The ECtHR found a violation of art 3 of Protocol No. 1 (right to free elections) to the ECHR and no violation of ECHR, art 13 (right to an effective remedy) as to the continuing failure to amend the legislation imposing a blanket ban on voting in national and European elections for convicted prisoners in detention in the UK.
She has also appeared in numerous other general and local election petitions, including the Winchester General Election Petition in 1997, the Bordesley Green election petition (in which she represented the successful petitioners) and Knight v Nicholls (2003) in which the applicant sought a determination that the election in Belle Vale & Halsbury was void due to undelivered postal ballot papers.
Helen has a wide-ranging administrative law practice. Issues of human rights, discrimination and EU law intersect across her whole practice. She works collaboratively with solicitors and clients, so that advice and, if appropriate, litigation, meet the client’s strategic objectives. She is happy to discuss a case ahead of instructions and is a qualified mediator.
Recent and notable cases include:
For a list of Helen’s Administrative and Public Law cases, please see here.
Helen acts both for individual and corporate claimants and for a wide range of public authorities. She is on the Equality & Human Rights Commission’s panel of preferred counsel, and acts as a special advocate.
Public authorities and regulatory bodies which she has represented or advised include the EHRC, the Information Commissioner, the Office of Rail Regulation, the Electoral Commission, the Lord Chancellor, Ofsted, Ofqual, the GMC and the Law Society. She has also represented blue chip companies in successful public law challenges.
Before taking silk Helen was Chambers & Partners’ Public Law and Human Rights Junior of the Year 2009 and a member of the Treasury A Panel. Since 2013, she sits part-time as a Deputy High Court Judge in the Administrative Court.
Helen is committed to protecting and respecting your privacy. In order to provide legal services to her clients, including advice and representation services, Helen needs to collect and hold personal data. This includes her client’s personal data and the personal data of others who feature in the matter upon which she is instructed. To read Helen’s privacy notice in full, please see here.
This year the Legal 500 says ‘courts respect her; clients love her; opponents are in awe of her’. She has also been described as ‘accessible, hardworking and handles a remarkable range of work with skill and panache’ (Legal 500); an ‘impressive’, ‘engaging’, ‘fearless and tactical advocate’, who combines creative arguments, a clear forensic style and an understanding and empathetic approach to clients (Chambers & Partners).
"Helen is brilliant in the space where public law touches equality law."
"Absolutely brilliant. A very clear advocate with deep understanding of human rights principles."
"Helen is very smart."
"Helen provides authoritative advice on complex Equality Act issues which are at the forefront of public discussion. Her careful analysis enables instructing solicitors and their clients to manage some very sensitive issues."
"Helen is a go-to silk on complex equality law issues, and her high-level, strategic advice on significant matters is invaluable." "Helen cuts through a myriad of complex legislative considerations to provide navigable solutions to clients' problems."
"Helen is an incisive silk, with very strong emotional intelligence and client management skills."
"Helen is a legal artist with a brilliant mind. She offers the instructing solicitor crystal-clear analysis and unparalleled advocacy."
"She is brilliant in court." "Helen has first-class knowledge of public law and excellent judgement."
"A brilliant advocate who is at the top of her game." "Helen has led a number of leading human rights cases; she is brilliant in court."
"Helen is a brilliant advocate."
"Helen is a prominent, go-to barrister for education matters."
"A very smart and highly capable and creative advocate."
"Exceptionally smart, very knowledgeable and has excellent judgement."
"'Helen is hard-working, responsive and an excellent advocate."
"Helen is very bright, hard working, possesses good judgement and is very easy to get on with. She is a delight to work with and produces a first class work product."
“Helen is a star and deals with specific election law issues very well.” “Very capable and very good with clients, she goes the extra mile and is very dedicated.”
"Helen is an incredibly nice opponent who takes on difficult cases and achieves significant results."
"She is really excellent."
"Still doing groundbreaking work and very much a leading public lawyer."
"Really outstanding to work with. A go-to public law silk."
Top class, she's both extremely intelligent and hugely practical." "She's a good communicator who is exceptionally knowledgeable and good with clients.
She fights hard for her clients but is a lovely opponent.
She is clearly one of the leading silks at the Bar.
Very approachable and really good to work with." "She is phenomenally intelligent.
A good advocate who is known for being involved in high-profile matters - she uses her broad experience to bring a different perspective to cases." "She's intelligent, committed, hard-working and very good with clients.
She is super bright, down to earth and always gets straight to the heart the matter." "A no-nonsense, highly intelligent advocate.
She did an absolutely first-class job, and was excellent at deciding which points to respond to in order to argue the case in its strongest form.
Immensely experienced.
She is firm, highly skilled in the law, and capable of bringing together a range of opinions from practitioners who themselves have had years of experience.
An incisive legal mind who is very experienced in equality law and human rights.
She is extremely bright and very able, and can construct extremely effective and persuasive argument. She is much liked by clients for her keen, unstinting approach, and her empathy, and her willingness always to go the extra mile.
She has a brain the size of a planet and is a fabulous advocate. Simply superb to work with.
A highly experienced silk.
Excellent on EU law issues, she is willing to pitch in.
The range of her practice is incredible – but not at the expense of her grasp of detail.
Intellectually rigorous, with clarity of expression.
Unflappable silk with exceptional knowledge of the area.
She's very, very clever and is excellent both on paper and on her feet." "She's personable, immensely bright and fantastically persuasive." "She combines excellent technical skills with a grounded, practical approach, and never loses sight of the big picture.
Has an incredible reputation and a very wide-ranging practice. She has been at the forefront of many areas of law and is a measured and authoritative advocate." "She knows what will and won't fly with the court and gets good results.
Very intelligent, committed, hard-working and very good with clients," she is "a pragmatic performer" who is "bright, charming and a delightful person to work with.
An incredibly elegant advocate; she is really persuasive and can articulate beautifully." "One of the leading practitioners on issues involving human rights and the Equality Act. She's a very impressive advocate.
She's reliable, clear-thinking and collegiate in her approach. She understands completely what we need and her work is always high quality.
One of the leading lights in equality law and human rights. She's very nice to work with, very bright, and good at knowing what will and won't fly with the courts." "She's reliable, clear thinking and collegiate.
An extraordinary silk. One thing that's very impressive is the degree to which she'll contribute throughout the litigation as a thoughtful participant." "One of the leading lights in equality, human rights and public law. She's very nice to work with, very bright, and good at knowing what will and won't fly with the courts. She gets good results and really cares about her clients." "Helen is calm and measured. She took good tactical decisions and made the case seem very simple.
She is brilliant on human rights and equalities arguments, and always has the ear of the court.
She is very bright, highly analytical and attentive, and particularly experienced in this area of law.
She is the pre-eminent education silk in cases involving equality and human rights.
Brilliant on human rights and equalities arguments, and she always has the ear of the court.
She is very well respected on the circuit." "Helen does very good work.
Pre-eminent in judicial review claims founded in discrimination enactments, and has a depth of knowledge and clarity of exposition that makes her an obvious first choice." "Brilliant on human rights and equalities arguments, she always has the ear of the court..