Jacinabox
Yes you need to complete this new ESA50, your claim is being reassessed. Treat it as a new claim and complete the form in detail and attach and relevant evidence that you have even if it has been sent before.
There have been changes to the ESA Descriptors and guidance since your were last assessed so please make sure that you use the latest guides to help you with the form.
www.benefitsandwork.co.uk/help-for-claimants/esa1 If you have further questions then please reply to this post and we will do our best to help.
Gordon