Swimming nappy is a must. Be prepared that the pool won't be any where near warm enough. Think where you will put the baby when you get dressed/undressed. Think through everything that you normally do when going swimming and how you will do it with a baby in tow (for example, you will have to dress the baby before yourself). Is there anywhere to safely leave the buggy? How will ou put your stuff into a locker - where will the baby be at this stage? Apart from that, have a fab time!!!