The top-secret setting was once part of an RAF base which in the 1950s acted as an early warning radar station designed to detect incoming Soviet bombers. The building, half above ground and half below, was once the front line in Britain’s defences against nuclear attack and was capable of holding 800 people in the event of an attack. For several decades it has stood largely forgotten on the Lizard pensulala in Cornwall - but is now the unlikely home of an ale brewery. But a fledgling brewery business moved in several years ago to breathe new life into the building - and say the heavily reinforced concrete walls creates the perfect condition for their drinks.