By Matt Hardy Henry Slade was last night named Premiership Rugby’s player of the season at a glitzy Central London awards dinner. The Exeter Chiefs centre has been pivotal for a West Country team on a major rebuild having suffered an exodus of top players across the last 12 months. Premiership RUgby chief executive Simon Massie-Taylor said: “Henry Slade has had a memorable season from start to finish, after missing out on the Rugby World Cup in France. “He led a young, new-look Exeter Chiefs side to within touching distance of the play-offs. “Henry is a world-class player and this season has a…