It's a bollix article based on a Sun bollix article. Not a shred of evidence - just speculation you could read anywhere. Waste of time reading it.
I've no idea if he's leaving or not, but I do know for a fact that the article has nothing but speculation in it - and it's copied from the Sun's speculative article. You'd get as much genuine info if you asked any old bloke on the street - i.e. nothing.
