I suppose we could debate this topic until the cows come home. This fraction difference is around 5/6% though. Today in Corfu the exchange is e1.445. ( I rang someone there) In England it's e1.392. It's true that if you shop around at home you can find better than e1.392 but this applies in Corfu as well. I belive Harold got a good rate recently from a hole in the wall at Corfu Town. To make it work for you though you need commission free sterling T/C's or a lot of cash to take with you.
So a family of 4 who spends £400 cash over a 7 day holdiay are about £18 better off. From our point of view as "Flight Only", car for 14 days accommodation and food and cigarretes/ alcohol we bring home, we can save at least £60. ( But it's what the individual feel comfortable with )
Anyway I'd rather give the commission to the Greeks.
Cheers
Negg