In 2019, Radakin initiated a programme of reform across the Royal Navy under the banner of Royal Navy Transformation. The initiative encompassed increasing the UK's operational advantage in the North Atlantic, developing carrier strike operations using the newly constructed aircraft carriers HMS Queen Elizabeth and HMS Prince of Wales, increasing the Royal Navy's forward presence around the world, reforming the Royal Marines into the Future Commando Force and improving the Navy's use of technology and innovation.[24] Controversially, this also included a forty percent reduction in admirals across the Royal Navy and a forty percent cut in headquarters staff.[25]
Radakin was appointed Chief of the Defence Staff on 30 November 2021.[27] Prime Minister Boris Johnson appointed Radakin instead of the Ministry of Defence's preferred candidate, General Sir Patrick Sanders, due to Radakin's reputation as a reformer and Johnson's anticipation of future naval conflicts in the Mediterranean and Indo-Pacific regions.[28][29] Radakin relinquished the position of First Sea Lord to Admiral Sir Ben Key on 8 November 2021.[30]
Radakin made his first Chief of Defence Staff speech to the Royal United Services Institute in December 2021. He stated that the security outlook for the UK was "far more complex and dangerous than at any time over the past 30 years" and that the geopolitical situation was in "a real sense of back to the future, with the return of the State as the central, indispensable feature of the international system."[31][32] Radakin also said that the UK military was at risk of looking "ridiculous" until it improved diversity and leadership in the armed forces.[33]
Radakin said on 7 January 2022 that the UK faced a number of security challenges from Russia, and that an attempt to damage underwater communication cables could be considered by the UK as an "act of war".[34][5] However, he also said that the UK and Russia continue to test daily the telephone connection between the UK Ministry of Defence and the Russian Situation centre, which could be used "if urgent talks were needed to de-escalate an incident."[5]
Asked on the BBC's Sunday Morning programme shortly after the 2022 Russian invasion of Ukraine whether Russia taking over Ukraine was inevitable, Radakin said: "No. I think we’ve seen a Russian invasion that is not going well".[36] Later, on 31 March 2022, he said Russian President Vladimir Putin had "already lost" the war in Ukraine due to "catastrophic misjudgments."[37] In June 2022, Radakin answered questions from the House of Lords International Relations and Defence Committee.[38] He said that, following support for Ukraine, replacing the weapons stockpiles of the UK could take "years" to achieve and that it may also be "five to ten years" before the UK was ready to deploy a division with sufficient capabilities to fight with US forces.[38]
In July 2022, he said "As military professionals, we see a relatively stable regime in Russia. President Putin has been able to quash any opposition. We see a hierarchy that is invested in President Putin and so nobody at the top has got the motivation to challenge President Putin. And that is bleak."[39]
In September 2022, Radakin paid tribute to Queen Elizabeth II following her death.[40][41] He described the relationship between the Queen and the armed forces as "deeply personal" and that the armed forces would perform their final duty to the Queen by participating in her state funeral.[40][41]
On 19 October 2022, Radakin delivered the annual Lord Mayor of London Defence and Security Lecture in Mansion House, London.[42] He discussed the wider security situation in Europe, focusing on Ukraine and Russia.[42][43]
In light of the 2022 strikes, Radakin, said it would be "slightly perilous" to expect the UK Armed Forces to be used routinely in the event of strikes by public sector workers. "We're not spare capacity," he said. "We're busy and we're doing lots of things on behalf of the nation. We've got to focus on our primary role."[44]
It was announced in February 2024 that Radakin would stay in post as Chief of the Defence Staff until autumn 2025 after proving to be a key player in helping Ukraine in its fight against Russia.[47]
Personal life
In 1995, Radakin married. He lives in Hampshire with his wife, Louise, and their four sons, born between 1998 and 2005.[3][5] Radakin is president of the Royal Navy Squash Association and the Armed Forces Tennis Association, and the vice admiral of the Royal Naval Sailing Association.[48]