PRM
Heathrow a few years ago. Assistance had been requested.
Crew & cabin crew long gone. My wife had broken her foot.
Nothing provided, just walk down all those steps to the tarmac,
then up all those steps to the terminal. Once inside I called on
an internal phone and eventually some cheerful chap arrived
with a wheelchair. Took about 90 minutes.
Thankfully the Airline itself is now gone. Asia, New Zealand,
Spain, no problem