Last week I was called to attend managers (1 above line manager) office and told that they were not happy with my performance and told that I could either take a lesser role or have an exit package. This was a bolt out of the blue. I have been there over 12 years with no performance issues, I had a positive appraisal in January with no issues raised. My line manager has given me supervision but not discussed any performance issues. I was sent home from the meeting on garden leave and told to come back in 3 days to discuss what I wanted to do. I have obtained a copy of the performance development policy and I have not been subject to this. Can they do what they've done? I have contacted my union and waiting for an officer to call me back. Please can anyone offer some advice?