Indeed I remember going to Rangoon on the way back from Hong Kong to LHR on VC10 around the mid 70s. I got off and spent 30 mins with a small number of other pax in a tiny terminal building and watched a Burma Airways F27 arrive to occupy the other stand.
Next stop was Calcutta, also no catering options. Back in the day BA (well still BOAC in all but name) seemed to have a different route every day to HK.
VC10s took me to a few other places BA no longer go to
Addis Ababa, Khartoum, Entebbe, Seychelles