West Ham striker Robert Hall has returned to Oxford on a month's loan following an earlier spell at the club this season.The 18-year-old was recently recalled to Upton Park having struck six goals in nine starts during his previous time with the Us. "We are delighted to have Robbie back," Oxford manager Chris Wilder told the club's official website. "Speaking to him, he is just as excited as we are which speaks volumes for the set-up here. "He was part of a settled side which went on a great run and we were disappointed to lose him, but could see the opportunity he had to be involved with the first team at West Ham. "We are really pleased to see him back and hope that he will carry on where he left off, playing a part in a winning side."