this is what the mums at my mums group are saying too.
The contacted huggies, who were very helpful and asked them to return 5 or so of the nappies to them for testing. So hopefully there was just a dodgy batch and theyw ill be replaced.
I ended up sending an email to KK and they sent me a small packet of nappies in the next size - just in case it was me that had the problem in buying the right size and not a problem with the nappies