Britain has accused Russia of not living up to its word on commitments to withdraw its troops from Georgia.
Foreign Secretary David Miliband, who's gone to Georgia for talks with President Mikheil Saakashvili, says the crisis isn't just serious for Georgia but for the reputation of Russia in the world.
He's the fourth major figure in a week to visit Georgia for talks with Saakashvili, who has pleaded for the support of the free world in his country's conflict with Russia.
Miliband complained the latest pledge by Russian President Dmitry Medvedev that all but 500 Russian troops would be pulled out of Georgia tomorrow and Friday is the third promise made by Moscow.
The top British diplomat flew into Tbilisi directly from a crisis meeting of NATO foreign ministers in Brussels that was called to condemn the continued presence of Russian troops deep inside Georgia.