Pampers Mega Packs are 2 for £26 at Boots.com at the moment. For the Baby Dry Size 3, this is 288 nappies in total. Using the PCBS24 code, I got another £5 off which works out at 7.3 pence per nappy. Free delivery to my local store.
Pampers Mega Packs 2 for £26 (additional £5 off using voucher posted earlier) @ Boots