Note the article says:
"Dr Williams said that the British Museum and the York Museums Trust would be looking to raise the funds to purchase the collection so it could eventually go on public display.
The proceeds would be split between the finders and landowners."
So therefore, the finders and the landowners would be paid for the treasure, not that they would keep it.
Here's an excellent FAQ on the UK's Treasure Act:
http://www.britarch.ac.uk/cba/potant15.htmlOne thing I've always wondered about hoards like this one is how did the hider pick the spot? Was it nearby their residence? What's the context of the find? What else is in the area of the hoard that might be contemporary, such as buildings or settlements?