By Benedict Tetzlaff-Deas A once-bustling town in the UK is now entirely underwater – and can only be seen during periods of extreme hot weather. The abandoned Welsh village of Capel Celyn, Gwynedd has been dubbed ‘Britain’s Atlantis’ after it was deliberately flooded in 1965 to create a freshwater reserve, known as Llyn Celyn. The flood wiped out farms, a post office, a church, a cemetery, and a school – and their ghostly remains are still visible today when the reservoir is low. It was a move which attracted fierce opposition at the time, and is still remembered by people in the area today. …