Hi Mr Grumpy, sorry to hear your news but believe me, once you get it all sorted, you will feel a great sense of relief.
I suggest you go to ‘Benefits and Work’ to fill out PIP form. It’s only about £20 to join for year but then you can download members’ step by step guides and it’s worth every penny.
If it’s like DLA application (I haven’t applied for PIP yet) you put that you can’t travel on bus and can’t drive, but then put that if you could have someone with you and get taxi’s you could sometimes go out. But please check that on Benefits and Work as would hate to give you wrong advice.
You have continued working for ages while dealing with PPMS and I think you’ve done amazingly well… but time to step back and look after yourself and not have to push yourself anymore.
All the best,