On 27 November 2020, the U.K. Supreme Court in Halliburton Company v Chubb Bermuda Insurance Ltd (formerly known as Ace Bermuda Insurance Ltd) [2020] UKSC 48 ruled on the approach under English law to determining whether an arbitrator’s failure to make disclosure of appointments in multiple arbitrations with overlapping subject matter and only one common party gave rise to justifiable doubts as to his impartiality such that he should be removed.

In an expansive judgment which sought to clarify the state of English law on the topic, the Court held that...