SUBSCRIBE ► https://bit.ly/SubscribeSkyFootball Sky Sports’ David Prutton attends a Select Group 2 PGMOL training camp to get a closer look at how referees prepare for being a matchday official. ►TWITTER: https://twitter.com/skysportsfootball ►FACEBOOK: http://www.facebook.com/skysportsfootball ►WEBSITE: http://www.skysports.com/football MORE FROM SKY SPORTS ON…