NEWCASTLE UNITED fans like to think of their club as one of the truly big footballing institutions in the country, and in terms of the Magpies’ support, heritage and potential, they are not too far wrong. But the problem is that Newcastle’s glory days are now more than half a century away and the era in which they were indeed the top club in Britain go back to the gas-lamp. Consider the facts: 1955 was the club’s last FA Cup win, it was 86 years ago that they won the Football League and over 40 years ago that the last piece of meaningful silverware was picked up. During that time, clubs of a lesser standing have won stacks of trophies. In short, most of…