"Right! Keep this up and we'll make a long distance swimmer of you yet."

Maybe. Probably not. He gives Ianto's shoulder a reassuring squeeze and twitches a faint smile.

"Want to keep practising or get out and try again tomorrow?"

John isn't sure exactly how afraid Ianto is of the water, and how much he can stomach of this floating business in one day before he needs to sit down and take a break.