Leggatt was called to the bar (Middle Temple) in 1983 and was appointed a Queen's Counsel in 1997. He joined Brick Court Chambers in 1985, where he practised commercial law, including areas such as banking, insurance, sales, and product liability law.[3] He became a recorder in 2002 and was a deputy High Court judge.[4]
Al Nehayan v Kent[2018] EWHC 333 (Comm), finding that a duty of good faith can be generally implied in law in 'relational' contracts
Serdar Mohammed v Ministry of Defence[2014] EWHC 1369 (QB), finding the United Kingdom in breach of its obligations under the European Convention on Human Rights, (specifically Article 5). The UK lacks detention authority under international humanitarian law to capture and detain individuals for longer than 96 hours in the course of the non-international armed conflict in Afghanistan.
Philipp v Barclays Bank UK PLC [2023] UKSC 25, finding that banks do not have a duty to prevent their customers from making payments to fraudsters.
Paul and another v Royal Wolverhampton NHS Trust[12][13] [2024] UKSC 1, finding that psychiatric harm is treated no differently from physical harm in the Law of Torts. Also that doctors do not owe a duty of care to members of the family of their patients to prevent them from harm caused by negligent treatment of the patient.