FOUL-MOUTHED TV character Nan has been hit with a ­trigger warning over fears she may offend snowflakes. BBC bosses deemed comic Catherine Tate’s 2009 festive special, Nan’s Christmas Carol, required content ­guidance for “discriminatory language”. Scenes in the 50-minute show include Nan, whose catchphrase is “what a f****** liberty”, mocking grandson Jamie’s new girlfriend for...