In a speech delivered at the Union of Chambers and Commodity Exchanges of Turkey (TOBB) in Ankara, Cameron said that he was irritated by some efforts in the EU to block Turkey's EU membership when he thought Turkey's contributions to the defense of Europe in NATO and Turkey's efforts in Afghanistan alongside with European allies.

They just don't get the fact that Turkey can be a great unifier. Because instead of choosing between East and West, Turkey has chosen both, Cameron underlined.

An EU without Turkey would be weaker. An EU without Turkey would be less secure. And, an EU without Turkey would be poorer, Cameron noted.