Alan Chamberlain, the circuit's longest serving referee, has resigned with immediate effect.
Chamberlain, 67, has officiated on the professional circuit since 1983 but decided to hang up his white gloves on Monday a day before the end of the world qualifiers.
I understand he was exhausted by the long hours the refs were required to work for little financial reward.
Alan refereed the 1997 World Championship final, was a long time official at the Masters and took charge of many other big occasions.
Like many referees, there were moments of controversy too but he was regarded as a very safe pair of hands and his sudden resignation has shocked his fellow officials.
He will continue to referee at the Championship League.