It was probably during Henry II's reign (1154–1189) that a forebuilding was added to the south side of the tower to provide extra defences to the entrance, but it has not survived.
Diperkirakan selama masa pemerintahan Henry II (1154-1189), sebuah bangunan depan ditambahkan di sisi selatan menara untuk memberikan pertahanan tambahan bagi pintu masuk, namun bangunan ini tidak bertahan.