I suppose it is time for my annual reminder that the best rates come from using the right debit card. Then, if you don't have TL left over from your last visit, you can use plastic at Dalaman Airport ATM. You are charged the day after withdrawal. So, if I had taken out hole-in-the-wall cash at DLM yesterday, using my good old Norwich & Peterborough card, my rate would have been 2.7248 TL/£. Anybody beat that?
Other no fee/0% exchange charge cards are available. It takes 2/3 weeks to open up a new account (for holiday use) if you haven't got a good one already,