The problem with the F word is that you have to mix the S word with it and S is for social. If you look at Monarch for example the beef there is 18-30 hours rest periods. So they have a social agreement to operate 2 nights only. This and CAP371 forces the Airline to roster 18-30hr rest periods before / after the 2 nights. Simple answer is 3 or even 4 nights with a hard rule for night 1 being short. Fatigue tests undertaken by UK carrier confirm the rationale
Which answer wins, the S word.
