Yes that's very woolly indeed, and the guidance documents are rubbish on that point, and also on eggs and egg products.
If you look at the actual document its written like an endless mobius band, saying first NO MEAT, and then personal 2kg allowance combined across all these categories, which in their detail actually exclude most normal meat products, and only include meat-based supplements for consumption and medicinal dog food. Unless of course you are from Faroe Islands or wherever....!
In fact there are so many multiple sources for the customs information, that it makes the problems worse. The laughable fact is that the UK and EU are each issuing different interpretations of the same issue.
All of which makes me want to have a meat-feast-barbecue before I travel, consume 15 kg each, and so never want meat again...