Rangers legend Ally McCoist is one of British football’s most popular broadcasters. But that doesn’t mean he’s exempt from upsetting his fellow professionals as it proved following the return of TNT’s Champions League coverage. The ex-Rangers striker and manager has been clipped walking in on an interview and in his usual style, the moment is causing a bit of a stir online. READ MORE: How Rangers fans can get their hands on special Fortuna kitAlly McCoist accused of ‘nicking beer’ in interview Ally McCoist was in Switzerland on Champions League duties for TNT Sports as Aston Villa made their f…