With regards to your query re swimmer identification. We check people into & out of the water electronically but we don’t manually count the swimmers in and out of the water. However where applicable we do do this (& note race numbers) for those that are not wearing wetsuits as an additional check re them given the higher risk associated with not wearing a wetsuit. Additional cover is provided by registration taking place at the event and so we have a list of who is on site and intending to race out of all those that have entered. Participants also have their race number written on the back of their hand as well as a sticker with their race number on it on their swim cap.