Britain's Foreign Secretary David Miliband says Russia's assault on Georgia shows it can't accept the Soviet Union era is over.
He told BBC radio that Russia was guilty of an act of "blatant aggression" against its neighbor.
Miliband says the political fallout from the conflict could include Russia's isolation from the Group of Eight industrialized nations. He is traveling to Brussels, Belgium, for talks on Europe's response.
The lawmaker told the BBC that the Kremlin had acted as if the Soviet Union had never disintegrated.
Relations between Russia and Britain have been strained in recent years, particularly after Alexander Litvinenko's poisoning. Russian emigres blame Moscow for the former KGB agent's unsolved death.
The discovery of the submarine has unveiled a few "inconsistencies." For example, how can one explain the fact that the sub was found where it needed to be searched for from the start?
When on a state visit to Singapore, Russian President Vladimir Putin promised to revisit the discussion of the 1956 Declaration between the USSR and Japan regarding the issue of the peace treaty with Japan
The TurkStream, which runs along the bottom of the Black Sea from Russia's Anapa to Turkey, will consist of two lines, each with a capacity of 15.75 billion cubic meters of gas a year