International powers will meet in London tomorrow to work on drawing up a list of Russian figures who could face asset freezes and travel bans if Moscow fails to de-escalate the current crisis over Ukraine, Prime Minister David Cameron has told MPs.
Mr Cameron acknowledged last week that sanctions against Russia could have consequences for the UK and its European Union partners.
But he warned: "Britain's own security and prosperity would be at risk if we allow a situation where countries can just flout international rules without incurring consequences."
Barack Obama warned Russia that the West will be forced to apply a cost to Moscow if it fails to change course in its dispute with Ukraine.
The ballot paper that the people of Crimea will use in Sunday's referendum was published today
Vitali Klitschko's visit to the eastern city of Donetsk is clearly an attempt to try to ease the divisions with Ukraine.