Eddie Jones suffers new blow with loss of England’s sports science head

• Dean Benton the latest member of backroom team to leave• John Mitchell set to replace Paul Gustard as defence coachEngland have been dealt a significant blow just over a year before the World Cup with another key member of Eddie Jones’s staff set to leave. Dean Benton is due to depart his position as the head of sports science, leaving Jones with another sizeable hole in his backroom staff to fill.The England head coach is still to appoint a replacement defence coach following Paul Gustard’s departure to Harlequins over the summer and the turnover of staff under Jones – a notorious taskmaste…