She then crossed the Atlantic to Nigeria to participate in the "Nigeria at 50" presidential fleet review and provide training to the Nigerian navy as part of the African partnership programme. She returned to Devonport in November. In April 2011, while under command of Captain Keith Blount, the ship took part in the COUGAR 11 deployment under the ultimate command of Commander Amphibious Task Group. During this deployment, she took part in Exercise Cypriot Lion. In May 2011, she was detached from CATG's COUGAR 11 deployment and sent with embarked Apaches to aid operations in Libya along with the attack helicopters aboard the French amphibious assault ship Tonnerre. This was the first time that Apache helicopters were sent directly into action from a Royal Navy ship. Her initial complement of three Apaches was bolstered by a fourth soon after, and later a fifth. The deployment included a large medical team, a sign of the ship's flexibility. On 4 May 2012, she moored at Greenwich to prepare for her role of providing logistics support, accommodation and a helicopter landing site during the London 2012 Olympic Games. From 24 to 28 May 2012, she visited Sunderland, her affiliated port, and made other port calls before returning to London on 13 July. After Olympic duty, "Ocean" returned to her home port of HMNB Devonport for a scheduled period of maintenance. The LPH role was provided by until 2014. On 22 July 2014, HMS "Ocean" took over the helicopter carrier role again, after her 15-month, £65 million refit, replacing , which then returned to her home port Portsmouth for the last time, being decommissioned on 28 August 2014. As part of the Response Force Task Group COUGAR 14 deployment, "Ocean" participated in exercises off Albania and France. In April 2015 "Ocean" took part in Exercise Joint Warrior 15-1 around the coast of Scotland, with Wildcat helicopters landing on her for the first time. She then stopped again in Sunderland where the ship's company exercised their right to the freedom of the city, with more than 300 officers and ratings parading through the city centre. "Ocean" became the Royal Navy Fleet Flagship in June 2015. In December 2015, she returned to port after Exercise COUGAR 15, an amphibious warfare exercise in the Mediterranean with the French Navy. In September 2016, " Ocean " left Devonport for the inaugural Joint Expeditionary Force (Maritime) (JEF(M)) Task Group deployment which is the successor to the annual Cougar deployments.