I've been lucky enough to be passed a snippet of Les' press release ahead of the 3pm announcement:
"Mauricio has decided he's taken us as far as he can and has stepped down. As Marco Silva happened to be walking by St Mary's at the time, we've offered him the role of manager, which he's accepted. Here are the 3 new signings we'd held back so Mauricio couldn't train their abilities out of them."