Britain is risking a nuclear Third World War by triggering provocations against Russia and seeking to pit Donald Trump against Vladimir Putin, the Kremlin is alleging.

The paranoid claim comes as Moscow is staging its largest naval war games this year with the atomic submarine Oryol sent out on a drill to fire missiles at a simulated Western enemy.

Russia's bizarre Doomsday Radio - supposedly linked to the nuclear readiness of Russian forces - cackled into life to issue new coded messages amid high tension with the West.

Among its indecipherable messages were 'Himalayan', 'Pekinsky' and 'Kommunike'.

Spymaster Nikolai Patrushev - ex-head of the Russian security council and FSB counterintelligence service, now a close aide to Putin - has a long obsession with the sway of MI6 and MI5.