Ask for a mandatory reconsideration and set out why you think the decision was wrong. If the decision was about whether you are well enough to work, you need to explain which of the LCW or LCWRA descriptors you meet and why. Use our free Work Capability Assessment mandatory reconsideration tool to check which descriptors you meet, and to write a really great letter that sets out your case. Research shows this increases your chances of getting the decision changed at the MR stage.