Gareth Southgate warns Premier League could soon be only 15% English

England manager Gareth Southgate with Harry Kane, who captained the team at the last World Cup finals.Photograph: Toby Melville/ReutersGareth Southgate fears that only 15% of players in the Premier League will be eligible for England in a decade’s time unless clubs give more opportunities to home-grown players.Southgate also urged English football not to become complacent amid the dominance of its clubs in Europe and, in a light-hearted quip, warned that the national side could be overtake