John
The ESA50 (Capability for Work) form is for an ESA claim, it has nothing to do with DLA or PIP or any appeal that you are making for PIP. PIP and ESA have different criteria even where the two appear to overlap.
To help you complete the form, have a look at our ESA Claim guides on the following link
www.benefitsandwork.co.uk/help-for-claimants/esa1 If you have specific questions then please reply to this post and we will do our best to help.
Gordon