The U.K. has sent extra military support to one of its overseas colonies at the bottom of the world, the Falkland Islands, amid concerns that it is facing increased risk of attack from Argentina, backed by Russia.

Two troop-carrying Chinook helicopters and a new surface-to-air missile system have been sent by the U.K. to the remote islands in the South Atlantic, known as Las Malvinas in Argentina. They were the subject of a short-lived war between the U.K. and Argentina in 1982, and lie to the east of Argentina, 8,000 miles away from Britain.

Read MoreRussia vs. EU: Where next in propaganda war?



The bolstering of the islands' defences comes after Russia's ambassador to the U.K. compared Britain's control of them unfavorably to Russia's annexation of Crimea, just over a year ago.

