My motto is ‘be prepared’ you’re given a time limit to fill in the form. Start getting your evidence together now.
If you put into a search engine PIP review form
Asset publishing gives a sample of the Government form with all the questions.
Citizens Advice give good too.
Sue gave you another link.
You need to tell them how things have changed since your last assessment.
I keep an MS diary which lists anything that has changed in my every day life and things I’ve needed to buy to help me function, and new aids.
I photocopied pages,
I typed the questions and my answers as find it difficult to write. Made it easier to add things too.
Just made sure my name and NI number on each page.
I have SPMS so explained that it is progressive. Just state the obvious as the person reading the review may not know what MS is.
Include any letters from Medics - NOT hospital appointments they show nothing.
As I said - be prepared.
Let us know how you get on.