Received a letter today changing my shift pattern so that as from 6 April I will have to work every weekend. Company policy (unwritten) is that everyone has at least every other weekend off which is what I do at the moment. This change will affect only myself and one other colleague out of about 60 employees. There is no obvious reason, ie. it doesn't save money or anything else I can think of.
I don't mind changing my shift pattern. I wouldn't object to having a flexible rota - at the moment it's fixed - but I really can't face working every single weekend especially as I work nights so it will seriously affect my family life.
There has been no discussion or warning, just the letter posted to my home address today. Should I refuse, appeal, use the greivance procedure or what?