Charlie Mulgrew enjoyed a very successful six seasons at Celtic. A product of the academy, Mulgrew was sent on loan to Dundee United in January 2006 before making his Celtic exit permanent with a move to Wolves the following summer. Spells at Southend United on loan led to a permanent move to Aberdeen in 2008 before Neil Lennon signed the former Scotland defender in 2010 to bring him back to Paradise. At Celtic, Mulgrew won five league titles and two Scottish Cups and was part of the iconic Celtic team that beat Lionel Messi’s Barcelona 2-1 in the Champions League in 2012. And whilst he loved …