Originally Posted by WeLieInTheShadows
Also acclimatised means 3 local nights away from base in a time zome more than 2 hours wide.
Basically you have to do more than a 3 days trip (4 days or more) LH going to east coast US or Carrib to be acclimatised.
If you don't (which a lot of the LGW trips are just 3 days) then you come back to the UK acclimatised still.
If you come back unacclimatised and have to operate then your hours of operation are restricted (you can't operate without 18 hours rest and limits are 1 hour less than scheme restrictions or more).
As tofster said as well. If you do end up not having your second day off you do get it in Lieu and you may take it later in the month at a mutuallty agreeable time and it will not be included to your monthly total of 9 days off.
Sorry to contraddict you here WLITS but I have just done the Scheme course (and passed it!) and this is not entirely correct.
As per CAP371 You just need ONE night away from LGW in a zone wider than + or - 2 hours and when you get back at base you're NOT acclimatised anymore.
So basically you can keep flying without any problems but the limitations are more as you'd be using the "not acclimatised" table in the FCO or scheduling agreement.
When you travel to a zone which is further than 2 hours (including if you had an unscheduled night sytop in Moscow for example) the FDP allowed is less than if you had had 3 local nights there. Same applies if you only have 2 local nights at LGW after a long haul trip (EVEN JUST A BULLET).