The PM has arrived in Poland to meet Polish Prime Minister Donald Tusk and the secretary general of the Nato defence alliance – and promise more money to support Ukraine.

The UK will provide an additional £500m to Kyiv on top of the £2.5bn allocated for this financial year.

Rishi Sunak wants to emphasise the UK’s role in defending Ukraine.

Mr Sunak will then head to Berlin to meet the German Chancellor Olaf Scholz on Wednesday.

Europe confronts an “expansionist Russia” and Ukraine faces a “difficult summer”, Downing Street says.

“Defending Ukraine against Russia’s brutal ambitions is vital for our security and for all of Europe.