An odd one. If the catering crew have decided for some reason to run the standard class catering from a static location over the threshold of the kitchen at the 1st class end of a nine car IET▸ , does this count as declassifying the first class carriages?
Definitely not - unless you can get approval from the on train manager. Of course one can pass through to access the catering, but return to your seat in Standard with whatever you purchase.
fyi Mark - Those IETs carry their own ramps both front & rear.