What has been apparent this season is that he’s a superb footballer, one of England’s most technically accomplished players and he’s got elite talent.
He’d be a huge upgrade on Jones on the left side of the central defence, offering all of the pace and physicality but with a brain, composure, a sweet left foot and infinitely better distribution out from the back. His leap makes up for his lack of height as well - he’s got everything needed to establish himself in the position for club and country for the next decade, given the opportunity.
Getting hold of someone like Bertrand short-term, with a view to eventually replacing them with Tierney would facilitate it immediately.