I wouldn’t be surprised if it has already been signed off and the government is just saying that “negotiations are ongoing” because the relevant parties aren’t ready to announce yet.
It’s quite a generic reply that shuts up any speculation without really giving too much away.
I had my fears that the government giving money to a theme park project might be controversial, but it does seem that public and parliamentary support is mostly coalescing behind the project, as far as we can tell. Both Labour and Conservative politicians seem to be supportive, and unlike, say, Heathrow, I have not seen any moaning about the prospect of Universal getting government money.