In days of yore the Comet used to freeze for England.
One of my instructors, also in days of yore, used to fly the Comet 3 at Boscombe Down. He regularly flew to Northern Canada and leave the aircraft to cold soak for a period. After the cold soak, they had to start up and be in the air with all systems working within a certain time. They then flew down to New Mexico and repeated the exercise after a hot soak.