Jonathan Lopian > New Square Chambers > London, England > Barrister Profile

New Square Chambers


A commercial chancery barrister, called in 1994, with an advisory and litigation practice primarily focused on company, insolvency and commercial law and with previous high-level professional experience in the field of corporate finance within the investment banking and international business sectors.

Specialising in all aspects of company and insolvency law. His commercial practice covers all types of contractual disputes, commercial fraud and claims relating to the law of agency, guarantees, banking, partnership, professional negligence, breaches of trust and fiduciary duty, unjust enrichment and asset-tracing.

Jonathan appears regularly in the High Court and in the Court of Appeal and is instructed both on short-term matters such as urgent applications for interim injunctive relief and on long-running cases from their inception through to final determination at trial.

Recent cases include: McTear & Williams v Engelhard & Others [2016] EWCA Civ 487; Hamilton v (1) Brown (2) C&MB Holdings Ltd [2016] EWHC 191 (Ch), [2016] BPIR 531; DMQA Investments Limited (In Liquidation); McKenzie v Marshall (2016); (Ch) JCAM Commercial Real Estate Property XV Limited v Davis Haulage Limited [2016] EWHC 772 (Ch); Godefroy v Company Health Limited & Others [2015] EWHC 3978; Re Calibre Solicitors Limited (In Administration) [2015] BPIR 435.


Call 1994.

Before commencing practice at the Bar, Jonathan worked for six years in high-level corporate finance. He was a corporate finance executive at the leading UK merchant bank Morgan Grenfell specialising in company flotations, mergers and acquisitions during the takeover boom of the mid-eighties and then manager of the corporate finance division of the international company Olympia & York, at the time the world’s largest private property development company which built Canary Wharf in London, Battery Park City in New York and First Canadian Place in Toronto. This previous professional experience provides him with a distinct and rare advantage in his legal practice with its heavy commercial and financial focus. 

Junior Counsel to the Crown 1999-2009 


Chancery Bar Association

Insolvency Lawyers’ Association


Cambridge (MA PhD); Cambridge (BA, Double First, History); City University (Dip Law, Distinction).

Senior Scholarship, Gonville & Caius College, Cambridge; Research Scholarship, Gonville & Caius College, Cambridge; Queen Mother’s Scholarship, Middle Temple

Lawyer Rankings

London Bar > Company

(Leading Juniors)Ranked: Tier 4

Jonathan LopianNew Square Chambers ‘Jonathan’s attention and quest for every item of detail is astonishing and he can demonstrate a case to the judge very efficiently and thoroughly.’

London Bar > Insolvency

(Leading Juniors)Ranked: Tier 3

Jonathan LopianNew Square Chambers ‘Very knowlegeable and experienced in insolvency to the point of reading how the courts will react to various scenarios.’