I use an N & P Debit card which gives what Colwyn is saying and it is normally a better exchange rate than on the street or in the banks in Fethiye.
I also use a Nationwide credit card for large purchases which is also zero handling fee and a very good rate in comparison.
Yes Bewya! This is one of the "right" solutions and, indeed, the one one I use. Thanks for posting it; it saves me from writing Part II to Menthol. But it may not be suitable for everyone. You have to put £500 into N&P every month for your "free" foreign money and you need a NW Flex current accout to get a NW credit card. I don't find either of these a problem. But I have no debt (not even on credit card), have never used an overdraft, am not looking for a loan, and don't worry about current account interest rate. Other people may have different circumstances and should do their own research