There are many lakes up and down the country which have organised sessions and have suitable safety in place. I would recommend you swim in one these locations and as there will be other like-minded swimmers there who you can buddy up with and swim in pairs or a small group. In addition you can also make new friends as open water is a very social sport. Not only is it another good safety measure, it makes training easier supporting each other.
Due to the climate, open water in lakes, rivers and the ocean