A well known UK holiday airline pays captains 7 times the EK rate for working a day off. If one managed to blag the infamous 'double - flex' then that would be 14 times. The 'double' kicks in if the duty starts ultra early or goes over midnight. I am sure the bean counters or 'management' would love to scrap it but it reflects the seriousness of sacrificing a day off. All fyi.