I suspect the Board and the Manager knew aobut the interst much sooner, but kept it quiet. Deals like this can be quite complicated, so likely some behind the scenes negotiations have been taking place.
I wasn't sure when he'd leave, but was always 100% sure it would not be for a Scottish club.
I'm actually OK with it happening this quickly, as it will allow us to bring in the new man for a full summer of preparation.
Much better than losing him in late July or early August.