Courtesy of Mailsports Swim Specialist. Mailsports Swim Specialist has 30 recommendations for open water swimming venues and events in the United Kingdom: 1. North Channel (21 miles) 2. Great North Swim (2-day extravaganza) 3. Cold Water Swimming Championships (in Tooting Bec Lido, London) 4. Sandycove Island Challenge Race (2 km) 5. Vibes & Scribes Lee […]