I have always used BBH night nappies and never had any problems with leaking or rashes. We just got rid of a bad nappy rash but I think I was caused by teething poos also and I still used night nappy plus, canesten, tons of zinc and double liners and took a while but all good now.
I really love these nappies, they need a cover and take a while to dry but I have 4 and manage in Victorias weather, even though they recommend 5 for full time use. I get them second hand and sell them on too, there's a good demand for them - they are sized by the way. X