The Westland Commando, operated by the Royal Navy was the HC4. The Commando had capacity for up to 28 fully equipped troops and had originally been developed to meet an Egyptian Air Force requirement. Due to the deletion of the amphibious capability, not required in the Egyptian desert, the most noticeable change from the Sea King was the deletion of the side floats, the main undercarriage being carried on stub sponsons. An improved variant of the Egyptian Commando, with changes including the fitting of folding blades common to the ASW variants, was designated as the Sea King HC4 by the Royal Navy and all the aircraft were new build.
 
First flying on 26 September 1979, due to its operational range of up to 600 nautical miles without refuelling, the HC4 'Commando' became an important asset for amphibious warfare and troop transport duties, in particular. Several Royal Naval Air Squadrons operated the Commando variant, such as 845 Naval Air Squadron, 846 Naval Air Squadron and 848 Naval Air Squadron. In British service, the Sea King HC4 was deployed on operations in the Falklands, the Balkans, both Gulf Wars, Sierra Leone, Lebanon and Afghanistan.
 
Towards the end of the Sea King's operational life, several HAS6s were repurposed by the removal of the ASW equipment, as troop transports. In 2010, the last of the UK's converted ASW Sea Kings to troop transports were retired.
 
Paint Scheme A
No.848 Naval Air Squadron, Commando Helicopter Force, RNAS Yeovilton ,  England, 2009
Paint Scheme B
No.848 Naval Air Squadron, Commando Helicopter Force, RNAS Yeovilton ,  England, 2011