Hi MumofOne
When my first son was six months old I started taking him to swimming (at
www.trinityhydrocentre.co.uk) and to Monkey Music. Although a bit pricey, they were such fun classes to go to for both of us, and we made some great friends. As a result, my two year old is pretty much swimming on his own now, and is a happy, confident boy. I'd highly recommend doing a couple of classes if you can afford them. Definitely not a waste of money in my view!
Good luck x