Turkey has begun the slow process of accession talks with the 27-member EU, but the bloc is deeply divided over whether it should be given full membership. France has taken the strongest stand against Turkish entry.
On his first visit to the country since becoming prime minister in May, Mr. Cameron will say Turkey would bring greater prosperity and political stability to the bloc thanks to its vast economic potential and growing influence in the volatile Middle East and central Asia.
“So I will remain your strongest possible advocate for EU membership and for greater influence at the top table of European diplomacy. This is something I feel very passionately about,” Mr. Cameron will say, according to excerpts from a speech provided in advance by British officials.