Sailor from Grantham retires from the navy after serving for more than 52 years Published: 14:00, 30 January 2021 A man who left Grantham as a teenager to join the navy is retiring after an incredible 52 and a half years in the service. Warrant Officer 2 Allan Mason, 68, affectionately known as âPerryâ, has notched-up the staggering record in regular service, 40 of those years on board or in support of the submarine service. It is believed to be the longest service in modern naval history. On February 12 the marine engineer, who was born in Caythorpe, will finally hang up his overalls for good. Personnel from the Submarine Flotilla at HM Naval Base Clyde applaud Allan Mason as he steps off a submarine for the final time during his 52-and-a-half year career. (44160254)