marina
If you have successfully passed the ESA medical and been found unfit to work, the subsequent ESA50s are classed as re-assessments of you existing claim.
If you fail the test and re-apply (after six months), or apply because of a deteriorated condition then this would be classed as a new claim.
You don't say whether you have appealed the decision, if not, you only have four weeks from the decision to do so, although you may be able to argue the case for any extension, because of Christmas and New Year.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
