Boris Johnson has warned that Britain may have to send troops to Ukraine if Donald Trump cuts funding when he takes over as President.

The former prime minister told GB News that if Russia gains the upper hand in the conflict, the UK may have to do more to defend Kyiv.

He warned that the US president-elect was listening to some pro-Putin figures in the Republican party with “bonkers” ideas on the war.

Mr Johnson said the decision by the US and its allies to spend billions on helping Ukraine was an “investment” against future expansionism by Russia and China – and could prevent the UK having to send ground troops.