Alec is regularly instructed in a wide range of commercial disputes, many of which involve jusrisdictional challenges and applications for WFOs or other injunctive relief. He is recognised as having good commercial judgment and an ability to identify and focus on the key issues in a case from an early stage of the proceedings. He is highly numerate and able to grapple with the detail of complex quantum disputes.

Privatbank v Kolomoisky & Bogolyubov (ongoing) – Acting for Igor Kolomoisky, a Ukrainian oligarch, defending a claim brought in London by a large nationalised Ukrainian bank claiming in excess of USD 2 billion alleged to have been misappropriated while he and Mr Bogolyubov owned the bank.

Candy Ventures SARL v Aaqua BV & Robert Bonnier (ongoing) – Acting for CVS pursuing a claim in deceit for damages caused by an investment in Aaqua BV and representing CVS and Nick Candy on an inquiry into damages alleged to have been caused by a short-lived WFO.

Apache North Sea v Euroil Exploration [2020] EWCA Civ 1397 – Acted for Euroil at first instance and on appeal successfully defeating a claim brought by Apache seeking an excessive contribution to the cost of drilling “earn-in” wells under a Farm Out Agreement.

Alec enjoys the forensic challenge presented by fraud cases, the strategic issues for both claimants and defendants, and the opportunities for cross-examination that arise.

Candy Ventures SARL v Aaqua BV & Robert Bonnier (ongoing) – Acting for CVS pursuing a claim in deceit for damages caused by an investment in Aaqua BV and representing CVS and Nick Candy on an inquiry into damages alleged to have been caused by a short-lived WFO.

London Capital Finance v Thomson & Ors (ongoing) – Acting for Mr Russell, a salesman, defending claims by the liquidators of LCF alleging fraud in the marketing of LCF’s investments.

• "Alec has great clarity of mind and always provides sound advice."  (Legal 500 2025)
• "A tenacious advocate in court."  (Legal 500 2025)
• "Alec drafts beautifully - his concision and ability to focus on what is really important are impressive. As an advocate, he is always well prepared and not afraid to run difficult points."  (Legal 500 2025)
• Alec drafts beautifully. As an advocate, he is always well prepared and not afraid to run difficult points or tell the judge that he is wrong (which sometimes has to be said)!"  (Legal 500 2025)
• "A classic user friendly team player barrister, who is very good at joining a team and rolling his sleeves up." (Chambers & Partners 2024)
• "Alec Haydon is not afraid to pin his colours to the mast. He is very user-friendly and thinks deeply about things." (Chambers & Partners 2024)
• "Alec is exceptionally hard working and on top of the detail. He combines excellent tactical awareness with calm and authoritative advocacy." (Chambers & Partners 2024)
• "He is very bright and calm, and able to forensically dissect the facts of a case." (Chambers & Partners 2024)
• "Alec has all the detail of a case at his fingertips." (Chambers & Partners 2024)
• "He's a very good advocate. With a very sharp and analytical brain, he's excellent." (Chambers & Partners 2024)
• "Alec is exceptionally practical and easy to work with. His instincts are right but he also delves into the detail and provides a perfectly crafted succinct response." (Legal 500 2024)
• "Alec has fantastic attention to detail and is highly focused, with great skill in absorbing complex information and identifying the key issues." (Legal 500 2024)
• "He is very calm in a crisis, leaves no stone unturned, and is impressive on his feet." "He has excellent attention to detail and a laser ability to assimilate information and focus on what actually matters to achieve the best result for the client." (Chambers & Partners 2023)
• "Alec is extremely sharp, astute and has an incredible eye for detail in complex cases." "He is commercially and tactically aware." (Chambers & Partners 2024)
• "He is very thorough, leaving no stone unturned to give clear and practical commercial recommendations." (Legal 500 2023)
• "Alec has a formidable intellect. He has excellent forensic skills and leaves no stone unturned in investigating and assessing a case. His advocacy skills are superb and he skilfully prosecutes his client's case." (Legal 500 2023)
• "Great to work with, very thorough and always on top of the details." (Chambers & Partners 2022)
• "He is technically excellent, responsive and a pleasure to work with." (Chambers & Partners 2022)
• "He is precise, focused and decisive - exactly what you want." "He is very hard-working: he rolls his sleeves up and gets into the detail, and he looks at matters from every angle." (Chambers & Partners 2022)
• "Very intelligent and robust, a good team-player and a very effective advocate." (Legal 500 2022)
• "He has a lot of flair and he is someone who judges respond well to." "An effective and well- prepared advocate."(Chambers & Partners 2021)
• "He is organised and effective." "A really bright guy - his written work is excellent." (Chambers & Partners 2021)
• "Very thorough and commercial. A notable new silk in the energy practice area." "Very impressive." (Chambers & Partners 2021)
• "He is outstanding – extremely sharp and quick, all over the papers, and always on call and responsive." (Legal 500 2021)
• "He is very good on the construction of various contracts and is a commercial and efficient   barrister." (Chambers & Partners UK & Global 2020)
• "He is excellent - he really rolls up his sleeves and gets stuck into cases." "Demonstrates excellent technical skills and a strong grasp of all issues." (Chambers & Partners 2020)
• "Displays fanatical attention to detail, making sure every stone is turned over and examined. During the case he has the ability to keep all the balls in the air." "Exceptionally responsive, thorough and hard-working." (Chambers & Partners UK & Global 2020)
• "A lethal cross-examiner and a joy to watch – fun to work with and clients love him." (Legal 500 2020)
• Puts clients at ease in conference, and talks to them on their level." "He has extremely good analytical skills, and he's quick to grasp complex factual situations." (Chambers & Partners UK & Global 2019)
• "Bright, diligent and someone who plays his cards right in order to get the right result." "His oral advocacy is very strong and he's an excellent tactician." (Chambers & Partners UK & Global 2019)
• "Very bright." "A very good strategist and a robust advocate." (Chambers & Partners 2019)
• "A very highly rated junior commercial silk who is clearly going places." (Legal 500 2018-19)
• "He's an exceptionally capable lawyer - a KC in everything but name." (Chambers & Partners 2018)
• "An intelligent and balanced advocate who takes a considered and persuasive approach." "He has a good tactical sense." (Chambers & Partners 2018)
• "He's not afraid to put his neck on the line and give a clear view on how the case should be presented." "He's exceedingly thorough and very decisive." (Chambers & Partners 2018)
• “He is very efficient and can absorb a lot of detail quickly” (Legal 500 2017)
• "He's quick, sensible, engaging, tough and committed." (Chambers & Partners 2017)
• "A very commercially minded and clear advocate." "He has extremely good analytical skills and is quick at grasping complex factual situations and industry concepts." (Chambers & Partners 2017)
• "He gets to the issues quickly and is very effective at identifying the best points to run." (Legal 500 2016)
• "Makes my life easy. He is unbelievably hard-working and has an encyclopaedic knowledge of the law. He gets to the heart of things straightaway and doesn't take any prisoners. He is always willing to help and come up with suggestions." (Chambers & Partners 2016)
• "A very good junior; responsive, quick, insightful and a very loyal team player." (Legal 500 2015)
• "Very good on fraud and careful to find the right strategy. He has huge experience in heavyweight commercial fraud cases and is great at fighting his corner." (Chambers & Partners 2015)
• "Incredibly good at devising strategy, getting to the key issues and finding a way through them that meets clients' commercial objectives." "He's very good on fraud and careful to find a proportionate strategy." (Chambers & Partners 2015)
• “He is extremely technically proficient. He has an excellent practice and is very well liked by his clients and his opponents. A real delight, he’s very sensible, very measured and very effective.” (Chambers & Partners 2014)
• “He immerses himself in the facts and produces beautifully drafted skeletons and pleadings” (Chambers & Partners 2014)
• "Careful to find a proportionate strategy." (Legal 500 2014)
• Alec Haydon has a “forthright style” and “an excellent ability to separate the wheat from the chaff” in a case. “Confident and direct” in his manner, he does well as he is “tenacious, thorough and insightful.” (Chambers & Partners 2013)
• Alec Haydon is a “very strong” junior who is “impeccable on paper”. He is also “pleasant to deal with and very hard-working,” according to sources, who commend the quality of his advice and his ability to handle complex jurisdictional issues. (Chambers & Partners 2013)
• "Alec Haydon is a "fiery advocate" who has also acted in some of the most significant cases brought before the commercial courts, including BSkyB v EDS and Berezovsky v Estate of Patarkatsishvili. Commentators reserve particular
• According to sources, he constitutes "an excellent choice due to his great talent and well-directed aggression in court." " (Chambers UK 2012)
• "Alec Haydon is an impressive junior with a widely admired advocacy style. He is "a punchy advocate who gives it his all," (Chambers & Partners 2011)
• "a perfect junior who is hard-working, thorough and willing and able to take responsibility." (Chambers & Partners 2011)
• "A rising star of the Commercial Fraud Bar, Haydon is singled out as a "hard-hitting advocate who really cares about his cases." (Chambers & Partners, 2010)"‘seems to have something of a Sumption about him.’ Commentators note that he has the ‘ability to make a point directly and the courage to see his case through." (Chambers & Partners, 2009)