(December 16, 2020, 3:24 PM EST) -- LONDON — A Supreme Court of the United Kingdom panel on Nov. 27 dismissed Halliburton Co.’s appeal challenging the impartiality of an arbitrator who heard its dispute with an insurer in relation to the 2010 Deepwater Horizon explosion but did not timely disclose appointments in two overlapping arbitrations, finding that while the arbitrator should have disclosed the other appointments, a lower court did not err in dismissing an application for his removal (Halliburton Co. v. Chubb Bermuda Insurance Ltd., No. [2020] UKSC 48, U.K. Sup.)....