When TS Mercury closed in July 1968 a group of former Mercury boys decided to continue the existing, rather loose, association of old boys. The chairman was former old boy and instructor Eric McGavin, assisted by retired Chief Officer ‘Dick’ Fraser. Unfortunately, within a few years Eric McGavin died and the Association also faded away. This sorry state was rectified in 1979 when a group of active old boys and former staff living in the Portsmouth area decided to re-form the Association under the Chairmanship of the late Captain Ronald Webb OBE.

The first annual reunion of the Mercury Old Boys’ Association (MOBA) was held at the Queen’s Hotel in Southsea in September 1979 and an annual AGM and Reunion was held every year until the Association was formally disbanded on 31st December 2019 (the final event was in September 2018). In addition to holding social events, the Association produced an annual magazine and it looked after the Mercury archives and memorabilia. In 1985, to mark the centenary of the founding of Mercury, the Association erected memorials on the school site and at Hamble Church. It also maintained the World War I and World War II Mercury War Memorials in Hamble Churchyard.

Although the Mercury Old Boys’ Association formally disbanded in 2019, a less formal version continues and is known as the Mercury Old Boys. It’s purpose is to help former members to stay in touch as well as act as a point of contact for all those interested in our history.