UK russia
UK prime minister vows Western allies will "respond decisively".
Explosions heard across Ukraine, as government calls out a "full-scale invasion", soon after Russian president's announcement.
"We will defend ourselves. When you attack, you will see our faces, not our backs."
HuffPost UK takes you through all the recent times Moscow has been accused of meddling in British politics.
Labour's Imran Hussain and Green MP Caroline Lucas were interrupted by the Speaker while being heckled by the Tory benches.
The prime minister wrongly suggested that the Chelsea FC owner had been targeted by sanctions over Russia's moves to invade Ukraine.
The defence secretary also said the British army could 'kick the backside' of the Russian president.
"The whole response has been pitiful. Pitiful."
The foreign secretary said she was not "embarrassed" about being pictured with Russian donors either.
Foreign secretary Liz Truss also said this year’s Champions League final should not be held in Russia.