Following his appointment, Mr Rokison then accepted appointment as an arbitrator in two further matters arising from the Deepwater Horizon disaster. In one of these, the insurer was Chubb and Mr Rokison had been appointed by Chubb. He did not disclose these subsequent appointments to Halliburton and, when Halliburton became aware of them, it applied to the High Court to remove him under section 24(1)(a) of the Arbitration Act 1996 (the "Act"), which allows for removal of an arbitrator where " circumstances exist that give rise to justifiable doubts " about the arbitrator's impartiality.