Two British diplomats expelled in a spying row. A blistering statement from Russia's foreign intelligence service calling Britain "a warmonger." And a threat from a top ally of Vladimir Putin to seize U.K. assets inside Russia.

As the U.S. under Donald Trump seeks to reset ties with Moscow and broker peace between Russia and Ukraine, Britain has been granted the status of Russia's public enemy number one.

It's a mantle it has held on and off over the past two centuries.