I always thought (yes I know - I should have checked) that you required 1 adult to supervise 2 four year olds when swimming. So as my twins were four last weekend we ventured out to go swimming this afternoon - me, dh, dd1 (6) and dt1 and dt2 (4).
Well they wouldn't let us in as the pool states one for one supervision for under 5s. Fortunately we managed to persuade FIL to come and watch because supervision from the gallery is sufficient!
I am cross because I was so looking forward to going swimming altogether as a family without relying on anyone else and being able to take them swimming on my own during the week when dd1 is at school.