Years ago, just after Spain became a Democracy, I was hauled into the Jerez Civil/ Military Airport Commander’s office to prove how me (a 21 year old) could fly a Piper Apache legally down the Airways from Lisbon (a refuelling stop) into his Airport. On presentation of my shiny new CPL/IR, he shut up and confiscated my 200 Rothmans on the premise that Crew weren’t allowed Duty Free. Moral of the story, always carry your actual licence with you.