"Please accept my sincere apology if any part of our First Class inflight offering fell below your expectations," the letter says. "Specifically, I have taken note of the lack of English subtitles for the Wagner Opera Siegfried." The former minister rails against business class travel: "No edible food. No airline pyjamas. I lie in my tailored suit." On another flight, he blasts the airline for its "ceramic food" and seat design that "owe a lot to the trans-Atlantic slave trade". On his diet and exercise regime, Mr Carr reveals his favoured breakfast is steel-cut organic oats and berries and two poached eggs. And his favourite exercise is the "wonderful one-legged Romanian deadlift".