We took our son for an intensive 1-week swimming course, as he is very behind compared to his school mates. He had half an hour each day with a woman called Lucy, who was utterly amazing and moved him on from being afraid of the water to being able to swim up and down the whole length (with a float) - she provided really superb tuition and understanding. Heartily recommended, I'm absolutely delighted with what she's achieved with him.