UK considers new Russia sanctions after Navalny frog toxin finding

Yvette Cooper says claim against Kremlin deeply serious' while Russia dismisses western feeblemindedness'

The UK is mulling fresh sanctions against Moscow after pinning blame on the Kremlin for the poisoning of the Russian opposition leader Alexei Navalny, Yvette Cooper has suggested.

The Foreign Office and four of the UK's allies - Sweden, France, Germany and the Netherlands - announced on Saturday they had determined that Navalny's death was most likely the result of poisoning using dart frog toxin arranged by the Russian state.