By Daniel Orme Sir Jim Ratcliffe wants to sign Luton star Ross Barkley as part of a dramatic Manchester United rebuild. The INEOS owner is now officially leading the Red Devils’ footballing department after his 25% purchase of the club was ratified by the Premier League. He has already laid out his intentions to get United challenging in the upper echelons of the division once more. As part of that, Ratcliffe is aiming to invest in the playing squad with Barkley among his targets, according to The Sun. The Red Devils are keen to bolster their midfield ahead of next season. Brazilian Casemiro h…