By Tom Blow Former referee Keith Hackett has slammed PGMOL for snubbing Rebecca Welch since her historic Premier League debut. Welch, 40, became the first woman to referee a Premier League fixture last month by taking charge of Burnley’s 2-0 victory against Fulham at Craven Cottage. Burnley boss Vincent Kompany was among those to praise Welch after the momentous occasion. Yet she hasn’t been picked for a Premier League game since her debut and was snubbed again in the latest list of appointments up to January 22. PGMOL (Professional Game Match Officials Limited) decides which referees are sele…