Have been avoiding this thread, somewhat selfishly, as I had so much support here and made an absolutely brilliant real life friend.
I just thought a few things might be useful
Ensure parent has a will.
Ditto power of attorney- these days for finances as well as health. So crucial. It's tricky enough with one but without is a total nightmare.
Make sure they have some form of photo ID. It's even worth re applying for a passport in my opinion but in some circumstances bus passes are acceptable.
If you're concerned about care in a home, contact the Care Quality Commission
Above all, realise what a tremendous emotional and practical burden this is, and get as much help as you can to alleviate it.