Marcus Rashford was once hailed as Manchester United's golden boy and the social conscience of the Premier League, but the misfiring forward leaves Old Trafford for Aston Villa with his reputation tarnished after a precipitous fall from grace.

It can be a lonely place in the bomb squad of Premier League clubs. During the past month, Marcus Rashford has found himself training solo, putting in the hard yards on the Harp Trading Estate in Stretford.

The England striker is one of United's highest earners but has been absent during a crucial period and is now set to leave on loan. Why?