Elod
It actually sounds more like a review of your benefits to make sure that you are receiving the right amount.
Q1. The DWP does not do the medicals that is why I think it is a benefit review rather than an assessment.
Q2. Your ESA could be suspended but I think that this is a very unlikely scenario.
Q3. This should not be an issue. if you were on Incapacity Benefit (ESA did not come in until 2008) then this would support the benefits review as well, it is possible that you have been underpaid.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
