At St Margaret’s Bay there is an underground deep shelter for St Margaret’s 5.5″ Battery. This site was the first one to use the unrotated projectile known as the Z – Rocket which was a anti-aircraft (AA) weapon. It was officially known as a UP or unrotated projectile. It was not particularly accurate, but the thinking was that if fired in large enough amounts an enemy plane just might get hit! Two warnings here – be careful when entering the deep shelter and the second warning it’s full of pigeons.