Thought I’d better add that the reminder came via E-Mail.
Just filled out the form, takes about 30 minutes but took me about an hour to get all the files up together like proof of address, proof of PIP entitlement, NI number and the all important photograph.
A bit of a PITA as it asked if I had the PIP letter that tells me/them how many points I’d scored on mobility and having spent 10 minutes looking for the saved PDF I have of that form when I went to the next page it said “how many points does it say I scored” and could have save my time because I already know how many but thought they wanted me to upload the form.?