 The fort was decommissioned on 14 June 1945 though maintained until 1956 when it was abandoned.Unlike some of the other forts, Sunk Head was clearly well outside territorial waters, and when the Marine Broadcasting (Offences) Act came into effect in August 1967 the Government was anxious to ensure that it would not be taken over again by an offshore broadcaster.On 18 August 1967 Sunk Head was boarded by a contingent of the 24th Field Squadron of Royal Engineers from Maidstone from the tug Collie, under the command of Major David Ives.