Karen
You are not required t walk pain free but any pain that limits the distance that you can walk should be considered, your need to be able to walk the distance "reliably" and on the "majority of days". these terms are defined in our PIP Claim guide.
If you don't use an aid then say so, it may not really matter as only one of the Moving Around Descriptors takes aids into account.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
