The England midfielder and Mathieu Flamini are back in the Gunners' matchday 18 for the Manchester United showdown but Theo Walcott misses out

By Wayne Veysey | Chief Correspondent Jack Wilshere has travelled with the Arsenal squad that visits Manchester United on Sunday after passing a fitness test on his ankle,can reveal.The England midfielder has been given the all-clear to take on the Premier League champions following two games on the sidelines.Goal understands that Mathieu Flamini will also be in Arsenal's matchday squad of 18 after recovering from a groin injury that has kept him out for a fortnight.But Theo Walcott misses out on the eagerly anticipated Old Trafford trip despite stepping up his training regime this week. The winger's return will be postponed until after the forthcoming international break following two months out with an abdominal injury.The return of Wilshere and Flamini increases the options available to Arsene Wenger, who had little option but to select the same team for the victories over Borussia Dortmund and Liverpool in the last seven days.Both midfielders will come into the reckoning for starting roles at Old Trafford as Arsenal attempt to build upon their outstanding start to the season.The Gunners will move five points clear of second-placed Liverpool in the Premier League if they defeat United, while extending their lead over David Moyes' team to 11 points.Wilshere's return is a relief for Arsenal and England, who named him on Thursday in the squad that hosts Chile and Germany in a friendly double-header at Wembley.The midfielder suffered a recurrence of his long-running ankle problems during Arsenal's Capital One Cup defeat to Chelsea 11 days ago and was given a breather by his club in order not to aggravate the joint.The 21-year-old has made 20 appearances for club and country this season but his form has been fitful, despite him scoring what Wenger described as one of the outstanding goals of his Arsenal reign against Norwich City in October.