Hi Sleepyhead
Welcome to Benefits and Work and the forum. You can learn about the forum here
benefitsandwork.co.uk/guides-for-claimants/forum - faqs and how to navigate the site.
We have the Guide to PIP claims and Reviews
benefitsandwork.co.uk/guides-for-claimants/pip. It's a very comprehensive guide, and the length can be a little daunting, but it will walk you through every step of the process and offer guidance on each question. When you've had a look, if you have any specific questions, come back and ask, and we will try and help.
I'm not sure what newsletter you were looking at, but within the guide, you will find advice about the definition of aids and how they apply to PIP.
BIS