Relations between Ottoman Empire and Britain have a long history. Since 1354 the ottoman Turks had been advancing westwards overrunning Constantinople and renaming it Istanbul in 1453 gaining control of the black sea and the main routes to the Balkans and driving on to the eastern Adriatic. owing to the exploits of successive sultans the ottomans were by 1520 the undisputed leaders of the Muslim world. for the rest of the century they cast their shadow over western Europe. then the encounters between ottoman empire and Britain have begun. formal diplomatic relations were established with the appointment of an English ambassador to the Sublime Porte as the ottoman government was known in 1583. in 1793 London received one of the first permanent Turkish embassies established abroad.