Marnot
The panel is not required to provide it's reasons for their Decision unless you specifically ask for it, see
Tribunals – Requesting a Statement of Reasons any subsequent appeal to the Upper Tier Tribunal would need to be on the basis of an Error of Law, see
What is an Error of Law? You can make a new claim for ESA but the Assessment rate will not be payable until a Decision is made unless you can show that you now have a significant new condition which in itself could result in an ESA award or a deteriorated condition that would lead to one.
Gordon