Chris' had gone out of favour- expensive and quality of food had gone down.
Unless he was there in person to look after his RAF customers, it was quite common for Chris' food to be rather indifferent.
But
expensive?? Surely not.
I used to prefer the Swan, now closed, for the authentic kebab experience. But Polis' was indeed the restaurant of choice.
Younger readers may wish to peruse this old PPRuNe thread:
http://www.pprune.org/military-aircr...ens-stool.html