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One Essex Court

Chambers of Lord Grabiner QC

Work 020 7583 2000
Fax 020 7583 0118
London, Singapore

Conall Patton

Work 020 7583 2000
One Essex Court (Chambers of Lord Grabiner QC)


Conall Patton acts as an advocate and adviser in a broad range of commercial litigation and arbitration disputes. His areas of expertise include contract/commercial, energy, banking, jurisdiction and choice of law, professional negligence, commercial judicial review and competition law.

In recent years, Conall has appeared in all divisions of the High Court, the Court of Appeal and the Supreme Court, as well as in large-scale arbitrations under a variety of institutional rules. He is regularly instructed as a member of a silk-led Counsel team, as sole advocate or alongside a more junior barrister.

Conall is currently acting (with Laurence Rabinowitz QC and Patrick Goodall QC) for Autonomy in high-profile claims against its former CEO, Mike Lynch, and CFO, Sushovan Hussain. He is also acting (with Laurence Rabinowitz QC) for Tesco plc in defending claims in the Financial List under Schedule 10A FSMA arising out of an historic profit overstatement. Conall acts (with Daniel Jowell QC) for MAN in defending large-scale competition law claims in the Competition Appeal Tribunal for alleged overcharges on sales of trucks. He is acting (without a leader) for Glencore in defending tax indemnity claims arising out of the sale of a Peruvian mining company, including at a five-day Commercial Court trial in April 2018 which led to a judgment in Glencore’s favour. He is acting (with David Wolfson QC) for Marathon Oil in a claim relating to its role as operator of certain North Sea oil fields. The trial judge (Robin Knowles J) said that Conall’s cross-examination of a JV audit witness “stood out for its accuracy and concision”: see [2018] EWHC 322 (Comm) at para 46.

Conall is a member of the Bar of the British Virgin Islands.


Called 2004; Gray’s Inn.


Irish, French, German.




St Columb’s College, Derry; Gonville and Caius College, Cambridge (2002 BA Hons, first class); Graduate School of Arts and Sciences, Harvard University (2003, Kennedy Scholar).

London Bar

Banking and finance (including consumer credit)

Within: Leading Juniors

Conall Patton - One Essex CourtOne of the leading banking litigation juniors of his generation.

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Commercial litigation

Within: Leading Juniors

Conall Patton - One Essex CourtHe has an outstanding reputation which is entirely deserved.

Within: Commercial litigation

One Essex Court is an 'excellent' and 'user-friendly' set that is ‘very good at all levels and particularly useful at the bottom as they have very high academic standards' according to instructing solicitors. The calibre of the barristers, from the top silks to the most junior juniors, ensures an impressive range of high-profile instructions. Lately, several of the set's members have had prominent roles on major cases, including Autonomy v Dr Michael Lynch, where Laurence Rabinowitz QC is leading the claim for Hewlett Packard, supported by Conall Patton. Rabinowitz QC and Patton are also facing Neil Kitchener QC in Omers v Tesco plcDavid Wolfson QC also represented EE in various claims brought by Phones4U arising out of its collapse.

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Within: Leading Juniors

Conall Patton - One Essex CourtA first-class commercial junior well able to turn his hand to competition law.

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Within: Leading Juniors

Conall Patton - One Essex CourtA gifted cross-examiner and very clear writer who is easy to deal with.

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Fraud: civil

Within: Leading Juniors

Conall Patton - One Essex CourtAbsolutely outstanding.

Within: Fraud: civil

One Essex Court is a 'go-to set for commercial and fraud work' with 'quality people at all levels' who are 'very enjoyable to work with'. Both juniors and silks are regularly called upon to represent clients on the biggest claims. Notable cases involving multiple members of chambers include Autonomy v Michael Lynch, in which Laurence Rabinowitz QC and Conall Patton are representing Autonomy. Rabinowitz and Patton are also opposing sides to Neil Kitchener QC's team on the Tesco Profit Overstatement litigation, OMERS Administration Corporation & Ors v Tesco Plc.

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International arbitration: counsel

Within: Leading Juniors

Conall Patton - One Essex CourtA gifted cross-examiner, very clear writer, and easy to deal with.

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