Russia has pledged to demonstrate 'tough action' to any future provocation by British Royal Navy warships operating in the Black Sea.

In a highly embarrassing security breach for the Ministry of Defense sensitive documents on HMS Defender and the future role of UK special forces in Afghanistan were found by a member of the public at a bus stop in Kent.

A British Navy warship breached Russian territorial waters off the Crimean coast on Wednesday, prompting a Russian patrol ship to fire warning shots and a Sukhoi 24 M bomber to drop bombs in front of the HMS Defender.

Moscow has slammed London after a Royal Navy warship passed through Russian waters.

There are conflicting accounts of an unfriendly engagement between the British and Russian navies inside Russian territorial waters off the Crimean coast.

Russian leader Vladimir Putin has responded to anti-Russia remarks by the newly-appointed MI6 Chief Richard Moore by dismissing the latter as inexperienced.

Russia's Black Sea Fleet is closely monitoring the movements and activities of the Royal Navy's HMS Trent which entered the Black Sea earlier today.