"If I have returned to the UK from Saudi however the Saudis wish to extradite me for drinking alcohol then I should not be extradited as this isn't an offence under UK law."
If you were drinking alcohol in S.A. then they have a perfect right to ask for extradition as a criminal offence was committed on their territory.
However, there's whole mess of the opposite - "you did XYZ in country Y and, though not illegal in Y, it's illegal in the UK so you're nicked mate". That is nasty.
Biting the hand that feeds IT
