Hi Ive just done this and it worked!
Go to boots.com then baby then changetime then nappies, select huggies and show all results
there the newborn size quite near the bottom
normally £3.75 each or 2 for £6
Has to be done this way to work;
Add x amount to basket
Log in to boots.com
Enter code RUGN89 (capitals)
The code is for £2 off, but it's taking it off every pack so for example if you buy 10 packs it's £10 + £2.95 delivery.
Try it and see, hope works for you too.