Martha Kearney visits Whitstable to discover the fascinating and mysterious story behind Guy Maunsell’s sea forts at Shivering Sands. Built in the second world war as air defences, these towers can still be seen from the shoreline, although they are now in a state of disrepair. Martha discovers their incredible and strange history. Once home to up to 265 soldiers, these huge metal boxes on stilts later became the base for a broadcasting revolution. In the 1960s, pirate stations such as Radio City, Invicta and the short-lived Radio Sutch (run by the musician and parliamentary candidate Screaming Lord Sutch), broadcast from the sea forts to huge audiences who wanted to hear the latest pop and rock records. Tom Edwards and Bob Leroi are two of the DJs with fond memories of their time aboard the sea forts at Shivering Sands, but there is also a darker history. David Featherbe’s father was lost at sea after visiting the Red Sands fort and foul play was suspected. These mysteries and the forts imposing physical architecture fascinate historian Flo McEwan and many artists such as Stephen Turner and Sue Carfrae. Today the forts lie empty and are slowly being lost to the sea, but they remain a source of inspiration to artists and photographers, as Martha discovers. Produced by Helen Lennard