So there we have it, after reading a right load of tosh from a few, it is clear the Yellow Book and the Pink ID card have been useful for many of us over the years.
They are both relatively easy to get and cost near nothing, so in my opinion are worth having in your arsenal to use, plus, in case of any future changes put upon us farangies, where one or both maybe required for long visa users....☺️
PS. Had my Yellow Book 12 years....