The DWP are supposed to look at your claim again prior to Tribunal and it could be referring to that. They may offer you an improved offer before Tribunal (but don't count on it). The only way to know is to ring and ask why the letter was sent. It's not easy to get through to the DWP at the moment. About 10 o'clock is the best time to get through apparently.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems
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