Trailing German capital ships in the lead up to the Battle of the Denmark Strait, Walrus L2184 of 700 NAS from HMS Norfolk was damaged by shellfire from Prinz Eugen in the Denmark Strait on 23 May 1941 while still on its catapult.
The final successful attack on an enemy submarine by a Walrus was on 11 July 1942, when Walrus W2709 of 700 (Levant) NAS sank the Italian submarine Ondina, along with the surface vessels South African Protea and trawler Southern Maid, east of Cyprus.
There were at least 5 confirmed enemy submarines sunk or damaged by Walruses during the Second World War, including the Vichy French submarine Poncelet which was bombed by Walrus L2268 of 700 NAS (HMS Devonshire) and attacked by HMS Milford on 7 November 1940 off the Cameroons. The submarine was damaged and forced to surrender, and later scuttled off the Gulf of Guinea. The crew of Petty Officer PH Parsons, Sub Lt AD Corkhill and NA Evans were all awarded gallantry medals.
700 NAS was disbanded in March 1944, pilots transferring into 771 Naval Air Squadron, but reformed as a Test Pilot School in October 1944.
700 NAS re-emerged in August 1955 as a Trials unit and from 1957 was based out of RNAS Lee-on-Solent to introduce the Whirlwind HAS.7. The Squadron carried on trials of de Havilland Sea Vixens on HMS Victorious and HMS Centaur during 1958 and from October 1959 formed at Yeovilton with the Saunders Roe P.531 to investigate what would be needed to introduce a whole new form of helicopter operation to the Fleet – which lead to the Westland Wasp.
700 NAS disbanded yet again on 31st March 2008, transferring its aircraft and personnel to 824 Squadron and also forming a new flight 824 OEU.
On 1st December the squadron reformed at RNAS Culdrose as 700M Squadron with a primary role of testing and evaluating the new AgustaWestland AW101 (Merlin EH101). The Squadron comprises 47 personnel and two Merlin HM Mk1 helicopters, fully instrumented, designed to gather data from trial sites throughout the world.