UK russia
Foreign secretary James Cleverly has called it a "war crime".
A critical dam in Ukraine's Dnipro river was destroyed yesterday, triggering a potential humanitarian crisis.
Both Ukrainians and Russians in occupied parts of Ukraine could be affected by the potential catastrophe.
The UK says the feud between the military group and the Kremlin "has reached an unprecedented level".
Kyiv has made it clear "there will be no announcement of the start" of their attack.
People have been arrested for wearing the colours of the Ukrainian flag
Jailed Kremlin Critic Navalny Pokes Fun At Prison Officials With Demands Of Moonshine And A Kangaroo
Imprisoned Russian opposition leader Alexei Navalny has released excerpts of his correspondence with prison administrators.
It might mean Russian forces have to split between attacking Ukraine and defending itself at the border, according to UK intelligence.
UK intelligence said it was "highly likely" this was the first public call for the president to leave office since the Ukraine invasion began.
Moscow has "increasingly ceded the initiative" to Kyiv over the last month.