Original caption from a BOAC ad from 1946: Passengers on long-distance Empire flights will soon be enjoying four course meals, served 10 000 feet above the Mediterranean or Persian Gulf. In a specially equipped London kitchen, BOAC’s experts are completing experiments with novel “deep freezing” methods. They are aiming at perfection in pre-cooking, packaging and freezing at exceptionally low temperatures, BOAC will establish a chain of depots where air meals will be prepared and terminals in the Dominions will be equipped for catering on return journeys. Picture shows a captain of a flying-boat dining with passengers when nearing Lisbon, en route to America. They are enjoying a three course hot dinner cooked and frozen some days before it was put in a special heater and served piping hot.
Text from flashbak