Toby Collyer has been a shining light in Manchester United’s pre-season preparations. With many first-team players yet to return to training this summer, Erik ten Hag took a youthful squad – first to Norway – and then on tour of the United States. The Red Devils opened their pre-season schedule with matches against Rosenborg and Rangers before flying Stateside to face Arsenal. Toby Collyer has been trusted by Ten Hag to play in all three of United’s warm-up games so far and the 20-year-old has taken the opportunity with both hands. The primary purpose of pre-season may be to build up fitness a…