There is no surviving picture of this tower, which is thought to have been constructed before 1795 and to have disappeared some time between 1849, when it was shown on Hugh Godfray's map of the island, and 1933, when there is no sign of it on the Ordnance Survey map. It is believed that it was undermined by the sea, which encroached closer and closer across the sandy shore to where it had been built.
The B tower is also sometimes known as Tour de la Pierre Buttée
