Deputy prime minister Dominic Raab will present further support to the independent investigation in addition to the £1 million provided earlier this year, following a request from the International Criminal Court (ICC) for more aid.

The UK will provide a police liaison officer based in The Hague to share information between the UK and the ICC; two police officers with expertise in the collection of intelligence through publicly available data sources and seven legal experts employed to support the ICC with presentations to court.

The attorney general Suella Braverman said: “I am determined that British expertise continues to be available to our friends in Ukraine in their search for justice.

“We will stand side by side as they uncover the truth and hold those responsible in Putin’s regime to account for their actions.”

The ICC launched its war crimes investigation into Russia’s invasion of Ukraine in March after an unprecedented number of countries backed the move.