After disbanding yet again in mid-1959, the squadron was reformed on 10 April 1962, as a Commando Helicopter Squadron with Westland Wessex HAS.1's. It was the first commando squadron to have these helicopters. While embarked aboard later that year, the ship was ordered to make best speed for Singapore to help quell the rebellion in Brunei and the subsequent Indonesian inspired insurrection. Troops were landed in Borneo and the squadron was immediately committed to supporting British Forces ashore. They alone facilitated troops in being able to patrol vast areas of the jungle while operating from the most basic of clearings. In 1964, the squadron won the Boyd Trophy for a second time as a result of this operation, and the nickname 'Junglies' was born. After being relieved in 1965, by 848 Squadron, 845 returned to Culdrose, to re-equip with the new twin-turbine Wessex HU.5, B Flight of 845 returned to Borneo, in June 1966, and were the last Junglies. "Bulwark" embarked B Flight in October 1966, in Labuan.