Gun batteries were also installed on the Humber foreshore at Stallingborough in the first and second world wars. During the First World War Stallingborough battery had two 6 inch breech-loading Mk VII guns; the First World War fort is evidenced by a pillbox. There was also a airfield (closed 1919) used by a flight of No. 251 Squadron RAF which carried out marine patrols with Airco DH.6 planes. During the Second World War the site was again used, with 4.7 inch quick-firing gun and a searchlight. There was also an anti aircraft battery at Little London, with positions for four guns. Post war a location near the Little London site was used as a Royal Observer Corps monitoring post.