I suspect the deal with Brentford broke down because we were in negotiations at the same time. We offered better than Brentford, and that's why Leeds refused the deal.
I also suspect that Grey's representatives we're also made an offer, now they're just dotting the i's and crossing the t's.
In all likelihood, Gray was sent for 2 medicals, so they could get this done, with one or the other, in time to meet PSR requirements. So if one fell through, they didn't waste a further day or two getting a medical booked in.