More than 200 swimmers braved the Severn Estuary waters at Clevedon Marine Lake this morning. The 15,000m-square (3.7 acre) lake is filled with 30 million litres of tidal seawater from the Severn Estuary on the Bristol Channel. Water temperatures for the dip were recorded as between 4 and 5C (39 and 41F). “It’s a shock to the system,” said Steve Treanor, a seasoned dipper...