All the seafront was defended by pillboxes and barbed wire. The whole of Felixstowe was also surrounded by a defence network of trenches and strongpoints.
A new battery was constructed at Brackenbury, in April 1915 and was armed with two 9.2" Mk X guns. A barracks for the garrison was built to the rear of the battery, outside of it's defended perimeter. A temporary railway was constructed on the road, to bring in the guns. The battery also saw service during WW2. Landguard was armed with two 6” BL guns mounted on Right Battery.
A PWSS (Portwar Signal Station) was set up on the roof of the Fort to control the shipping approaching Harwich Harbour. The Station was run by the Royal Navy.