HOME SECRETARY Yvette Cooper denounced “aggressive language” from Vladimir Putin today after the Russian leader threatened to strike Britain in revenge for British-made missiles being fired on Russia.

Mr Putin said Russia has tested a new intermediate-range weapon in an attack on Dnipro in response to Britain and the US allowing Ukraine to fire long-range missiles they supply at targets on Russian soil.

The US said the weapon was a new, experimental intermediate-range missile based on Russia’s existing RS-26 Rubezh intercontinental ballistic missile, which could potentially hit Britain.