Thanks for the links.
The Sun article is from June 6 2018 - 40 days before the deal was done. The Standard article was after the deal was done. I'm going to stick with the Standard figure.
(Oh, and the other link is simply a blog piece, not reporting).
The new FIFA loan regulations won't come into effect until the 2020-21 season, but given the number of exceptions and exemptions that will be applied, they will be virtually meaningless.