If you're going to have a baby or just had one then get yourself down to Waitrose soon to get some of these Pampers newborn nappies. I've done the mental math and they work out cheaper than any other retailer in UK.
4.8p per nappy for Pampers New Baby Size 3 Carry 50 Nappies 50
4.4p per nappy for Pampers New Baby Mini 2 3-6kg 54s
All you have to do is add them to your Waitrose PYO list first and buy in batches of 3 mix n match. There is 3 for £12 offer on and the PYO gives the extra 20% off.
What is Waitrose PYO and how does it work?