@Jason1979m : No, it is not part of EU. You will need to buy roaming add-ons as per https://ee.co.uk/help/add-ons-benefits-and-plans/call-or-going-abroad/roaming-costs/countries/turkey... .
If you are on contract, remember to text ROAMING to 150 before you leave to check roaming is enabled on your account.
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