During the preparations for the Battle of Jutland, Allingham was ordered to join the naval trawler HMT "Kingfisher". Onboard was a Sopwith Schneider seaplane that was used to patrol the surrounding waters for the German High Seas Fleet. "Kingsfisher" had been the first trawler to be equipped with a seaplane, in May 1915. Allingham's responsibilities included helping to launch this aircraft. Although the "Kingfisher" was not directly involved in the battle (she shadowed the Grand Fleet and then the High Seas Fleet), Allingham still rightfully claimed to be the last known survivor of that battle and could recall "seeing shells ricocheting across the sea."