Hi,
We use the Huggies swimmer nappies; they're great. As for sun block, our mid wife recommended that we did n't use any sunblock until our little one was a year old. She said that even the ones that are recommended for babies can be too heavy for their sensitive skin. So we have an all in one swimming suit that covers just about everything and a hat. We also don't go to the swimming pool in the middle of the day when the sun is at it's fiercest. It has been trcky at times keeping her in the shade, but we've managed it and she turns one next month, so we can start slapping on the sun block.
Jools