Referee Announced The currently appointed referee for Coventry City's Championship fixture against Preston North End on Saturday is Carl Boyeson.This Hull based referee, who is a Central Heating technican, was 22 when he first took up the whistle. He was promoted to the select group of Assistant Referees in 2000 and on to the National list of Referees in 2002.This will be his first Championship game of the season. So far, he has six matches and has shown 21 yellow cards and one red in one League Cup tie, two League One games and three League Two games.Coventry have yet to win a game when Mr Boyeson has been in charge. His last City match was the 0-0 draw at Doncaster Rovers last season. Previous matches are the 0-0 home draw with Charlton on April 13 2009, the 1-0 defeat at Stoke City on November 6th 2006 and the 1-0 defeat at Bradford City on December 28th 2003.His assistants are Mike Blackledge from Cambridgeshire & Mark Sutton from Derbyshire and the Fourth Official is Neil Hair from Cambridgeshire.