I've been told that my role is planned to significantly change. Half my portfolio is being moved somewhere else - it's the most significant, stretching and important work area I look after. The responsibility I'd be left with is not commensurate with my seniority and not comparable in responsibility to others working at my level. When I asked what would be replacing it I got vague mutterings of "shaping a new role" without any indication what that means.
Other roles at my level are also being changed, but they are both being given better opportunities because of the changes (neither of them are inheriting my work).
Does anyone have any advice on how I should handle this? I'm not really sure what questions I should ask, where I stand, if I should be going to the Union on this. Many thanks.