My dad (a plumber etc for the NHS) is going to be on-call on christmas day, he's done it before but never actually got called out. But his boss is saying that if he does get called out, he'll only be paid the little extra, for it being a saturday! Even though he's been called out on other bank holidays before and gotten extra for that, so has always assumed the same applies for christmas.
BUT his union person is leaving soon, and doesn't really care, should he go up higher in the union?