Hi Archie64
The short answer to your question, there is a backlog in reassessing claimants.
ESA/UC (Support/LCWRA) is an indefinite award with scheduled reassessment so there will be no end date or award length on the Decision Letter, if you have the assessment report then the "prognosis" is used to set the date, failing that contact the DWP office dealing with your claim, the reassessment date will be recorded on your computer record.
You will continue to receive payment until a new decision has been made.
Gary
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
