St Margaret’s Bay Defence Tunnels 

These tunnels were possibly smugglers tunnels or linked to the former gun battery at the top of the cliffs.
During the early part World War Two the tunnels were converted for defence of the beach which was considered a likely invasion point. There were two observation/ machine gun posts looking out from the complex towards the channel.
The tunnels are lined with tin and brick at regular intervals with an unlined section that leads to the beach below.
The post was initially manned by the 70th Battalion The Buffs until November 1940 when the 5th Battalion Royal Marines Commandos took over from them. At the end of the war the tunnels were sealed with coastal erosion playing its part in uncovering the complex.