Death in the Clouds was first published in 1935. Fontana first published it in 1957 (although my copy states 1657!). This copy was the third fontana issue, published in November 1959.
The Paris plane rolled to a stop. The passengers stood in the aisle, waiting for the door to be opened. From the windows they could see their friends and relatives waiting for them. But they were in for a ride surprise, for the door was opened, not to admit a smiling stewardness who would conduct them to the Customs department, but a grim faces inspector, accompanied by a uniformed policeman.
The bewildered passengers found themselves being led to a small private room, and unpleasant interrogation - for high over the channel a murder, quick and mysterious, had been committed.