This is not limited to the rail unions involved, the nursing unions (or at least Unite most vocally), are not happy either and are getting the main headlines at the moment. Basically what's believed to be going on is the Government are trying to avoid reaching an agreement anywhere, because any sector that gets one will immediately strengthen the case for workers in other sectors. What's made this difficult for them though is nurses enjoy by far the strongest public support, as much as 67% from the last survey I saw just before Christmas, while RMT and ASLEF support is much lower. But if the nurses get a deal, then rail unions will be among many suddenly empowered to go further.