Becoming a Premier League manager is hard enough. Staying employed as a Premier League manager would appear to be even harder - particularly given the financial firepower now at the disposal of clubs up and down the country. Longevity and loyalty may be heading out of fashion, but it hasn't always been that way. Here, we take a look at tenPremier Leaguemanagers who stood the test to time to earn a spot among the longest serving top flight managers. 10. Sir Bobby Robson - 1,815 days Newcastle... Click here to read full news..