In full: Boris Johnson announces sanctions against Russia as troops enter Ukraine

Prime Minister Boris Johnson says the UK will introduce "immediate" economic sanctions against Russia, and warned that President Vladimir Putin is bent on "a full-scale invasion of Ukraine."

The PM said Putin had "completely torn up international law" and British sanctions would target not just the regions of Donetsk and Luhansk but "Russian economic interests as hard as we can."

Johnson is to set out further details of the sanctions in the House of Commons later Tuesday.

He told broadcasters that this would be "just the first barrage of UK economic sanctions against Russia because we expect, I'm afraid, that there is more Russian irrational behaviour to come."