Bulgarian journalist Christo Grozev told the BBC one method was to use a sledgehammer, and another involved using a "suicide bomber".

Roman Dobrokhotov tells the BBC he thinks Vladimir Putin ordered the operation against him.

Only a "remote chance" Russia would directly attack the UK if the countries were at war, Admiral Radakin said.

A Russian foreign ministry spokeswoman says the British ambassador had also been summoned.

Dylan Earl, 20, pleaded guilty to breaching the National Security Act and aggravated arson after London fire.

David Ballantyne Smith is sentenced to 13 years and two months in prison for spying for Russia.

The BBC gets exclusive access to the crime-fighting team causing "friction" for sanctioned oligarchs

Beijing is told its interests will not be served by an alliance with Moscow after Ukraine invasion.