Dmitry Medvedev has warned Moscow may seize "valuables of the British Crown" in revenge for the UK using frozen Russian assets to fund military support for Ukraine.

The former Russian president, a key ally of Vladimir Putin , issued the warning after Britain announced a package of around £1bn for Kyiv's war effort on Wednesday.

UK Defence Secretary John Healey said the package was paid for by frozen Russian assets.

In a message shared from his Telegram account, Mr Medvedev, who is deputy chairman of Russia's security council, said Moscow could seize British assets and take more Ukrainian territory in response to the move.

He also referred to British Foreign Secretary David Lammy as "the English idiot".

Mr Medvedev wrote: "British thieves transferred Russian money to neo-Nazis. Con

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