Unknown Helicopter: "Plymouth Radar (No radar at Plymouth), request radar vectors to St Mellion (a local golf course)."
Plymouth Tower: "Head towards Callington, its round there somewhere."

10 minutes later...

Heli: "Plymouth, I've found St Mellion, but can't find the Heli Pad."
Plymouth: "There's 18 of them, they've all got little flags in the middle!"