I assume you actually mean VR – Voluntary Redundancy?
If you're offered VR what you get will depend on your age and length of service, up to a maximum of 104 weeks pay. You can work out what you might get by using this ready reckoner
EVR is Early Voluntary Retirement and is a different thing that involves receiving an enhanced pension. But having recently re-read the CWU's 4 pillars pension agreement, I don't think it's still on the table.