All of that should give some points (and hopefully enough to get PIP).
As explained you need to be able to do things safely, repeadily, reliably, in a timely manner and at an acceptable standard.
If you have regular falls + pain, you’re not walking safely.
Your best bet here is a record of times when you’ve fallen and someone saw it, you had to go to A&E, see your GP due to bruising etc…
If you had the chance to see an OT, have their report
or contact social services, they can make an assessment in your house (you tell them what your issues are) and they can provide aids (eg handle bars to get in the house, perching stool etc etc….)
Same with using a walking stick.
Youll have your prescription from your GP, reviews with them showing painkillers you’re taking aren’t doing much or that some of the ones they suggested you can’t take.
Also anyth7ng from work that shows adaptations they’ve made for you, however little.
The best is to look at this website. You need to pay for the guides but Theyre a gold mine
https://www.benefitsandwork.co.uk
Also this FB page is full of reliable information
https://www.facebook.com/groups/278260135547189
Fir a first application, I’d start by looking at all the info, gathering as much as you can, look at stuff you’ve never asked for (because you didn’t know it existed or thought you could do without) etc…
and then start the claim.
Also remember, PIP isn’t an out of work benefit. You can get PIP even if you’re working full time