Hi G and Welcome to the forum, you might want to have a look at the following FAQ which explain where everything is
Welcome to Benefits and Work In case you are not aware, your real name appears to be showing in the forum, if you want to change this then follow the instructions in the following FAQ
My full name is showing, how can I stop it?
Yes, DWP are initiating reassessments of PIP a full year before the award is due to end.
It doesn't really matter who fills out the form. However, if doing so would contradict the limitations you describe you should explain how you were able to do so.
Make full use of our PIP guides
PIP help for claimants You might wish to bookmark/favourite this on your web browser now so that you can find it easily in future. That will allow you to return with further questions/comments without having to start a new topic each time. It helps us enormously if everything relating to the same claim is kept in one place - and I hope you will find it useful too