Well, nothing lasts forever… it’s been a blast! Sportsmail’s brilliant columnist bows out after almost a decade at the top By Des Kelly for the Daily Mail Published: 22:30 GMT, 31 May 2013 | Updated: 12:07 GMT, 1 June 2013 50 View It’s time to bid you a fond farewell. This is my final column for Sportsmail . It has been an absolute privilege and an honour to be allowed to sound off on this page without compromise for nearly a decade, but an exciting adventure beckons and life moves on. I’m joining BT Sport to present four live TV shows a week for the new channel when the football season starts. The idea was to leave you with a lasting message of great significance. So I dusted off the archive, revisited the remains of some 2,000 articles and tried to examine just how much the world has changed in that time. The hair is grey: Little has changed in the footballing world as Jose Mourinho gets set for his Chelsea return More from Des Kelly for the Daily Mail… Des Kelly: When it came to the most important tick of his career clock, Sir Alex bowed out at the…