Endresult
I can't tell from your posting history if you are CX or not; suspect by your use of the Man /Teneriffe comparison the answer is not.
Assuming you are not; Firstly, are you saying the UK Charter World views on fatigue are the standard we should all aspire to? Secondly, in your operation to Teneriffe were the AFTLs you operated under written to cater for the fact that one or more pilots may be based on a different continent from the others?
If you are a Cx pilot.......WTF ?????