'Significant falling out’ between Navy head and Marines chief Defence Secretary rejected attempts to expand role of Marines commandant 2 March 2021 • 9:36pm A Royal Marine of the Surveillance and Reconnaissance Squadron during Winter Deployment 21 in the Arctic. Credit: PO Phot Si Ethell/Royal Navy There has been a "significant falling out" between the head of the Royal Navy and the Royal Marines chief after the latter resisted attempts to expand his role. The Defence Secretary has rejected plans to double-hat the role of Commandant General Royal Marines (CGRM) with another job. Admiral Tony Radakin, the head of the Royal Navy, was thought to be in favour of moving the role of CGRM to a more senior officer.