Get the forms from the Office of the Public Guardian. (For both health & Welfare, and Money & Property.)
Don't be afraid of the size of the package!
The instruction leaflets are bigger than the actual forms.
Answer one question at a time, then go to the next one.
Get his GP to be the "Certificate Provider"
Arrange for a signature witness. (There will be several signatures needed)
People to be told, should be folk who will not object to what has to be done.
Solicitors are really not needed, unless there are major business interests.
Bod