In 1806, during the Napoleonic Wars, Russian Empire invaded Ottoman vassals of Wallachia and Moldovia. In Response, Ottoman Empire declares war to the Russian and closed Bosporus Strait for Russian Vessels. Meanwhile, Great Britain who was both allied with Ottomans and Russians against France's Napoleon quickly declare war on Ottoman Empire. While Russian and British troops busy battling Napoleon on the continent, British fleet under Admiral Sir John Duckworth with 15 ships (8 of them was ship-of-the-line) sailed to the Dardanelles to attack Constantinople.
On 14 February 1807, The fleet arrived at the mouth of the Dardanelles, Ship-of-the-Line HMS Ajax was caught fire and exploded, killing 250 of its crews.
Ottoman shore battery stand ready and began pounding the British fleet, British fleet suffer some casualties, nonetheless they able to continue to Sea of Marmara and met up with smaller Ottoman Fleet, fierce battle ensued. Some of Ottoman vessels were destroyed, but other Ottoman warships successfully blockaded the British Fleet. Ottoman guns shelling the British fleet from nearby shores and islands. British set up landing party under Admiral Louis to take Ottoman battery on Prota island but repulsed by Ottoman forces. After stranded with no gain and suffering heavy casualties, The Ottomans force the British Fleet to retreat. in the Dardanelles passage, Ottoman forts bombarded the British fleet, inflicting heavy damage and more than 216 casualties to the British.
After failed British expedition in 1807, Russian Empire fearing of war against Ottoman Empire and also French Empire decided to make peace with their archenemy, Napoleon of France. Meanwhile in 1809 Great Britain signed peace with Ottoman acknowledging Ottoman sovereignty and control of the straits between Europe & Asia.
