Hi cartoonhead and Welcome to the forum, you might want to have a look at the following FAQ whichs explain where everything is
Welcome to Benefits and Work It is current DWP practice to start reassessment a full year before the PIP is due to end. Legislation allows this (in fact, it allows reassessment the next day if they see fit!), I'm afraid there is no way you can challenge this.
I don't know whether you used our guides last time, but certainly suggest you make full use this time round
www.benefitsandwork.co.uk/help-for-claimants/pip May I suggest that you bookmark/favourite this on your web browser now so that you can find it easily in future? This will allow you to return with further questions or comments about your PIP without having to start a new topic each time. We ask members to keep everything relating to the same claim in one topic as it helps us enormously - and I hope you will find it useful too