Britain's leader is expected to urge partner nations to provide Ukraine with further long-range missiles to strike Moscow's positions during talks in the UK capital on the upcoming Friday.
Britain's leader will host Ukrainian President Volodymyr Zelensky alongside what's known as "alliance of supportive nations", consisting of more than 20 of supporting nations who have agreed to offer Kyiv security guarantees once a ceasefire is arranged.
The Ukrainian leader has been pleading for weeks for more long-range weapons from allied countries, a step that Russia has stated would intensify the conflict.
The Ukrainian president is coming from Brussels, where he met EU leaders on the previous day pursuing funding aid.
"The single figure participating in this conflict who declines to halt the fighting is Vladimir Putin," Starmer remarked.
The Prime Minister will also declare that a hundred further anti-aircraft missiles will be delivered to Kyiv earlier than planned, as specified in a multi-billion pound agreement struck between Britain and Ukraine in spring.
Ukraine's leader comes off the back of important international achievements recently: the US President's move to enact further sanctions against the Russian government, and EU nations consenting to finance Kyiv's budgetary shortfall.
The Prime Minister is seeking to maintain the momentum by intensifying the pressure on Russia to pursue an end to the hostilities.
Britain's leader will encourage leaders to ramp up the delivery of long-range weapons following a successful operation on an industrial facility in Bryansk, Russia, using Britain-delivered missile systems.
"Additionally, his brutal strikes on innocent children in a nursery recently show that perfectly obvious," he stated further.
Several minors were among at least seven fatally wounded in numerous enemy assaults on the country, which targeted a preschool facility in the important metropolitan area Ukraine's second city.
Sir Keir will consult partner nations on how to take Moscow's energy exports off the global market.
They will also discuss utilizing blocked Russian resources to supply the Ukrainian government with economic assistance, while the initiative encountered divided opinions and jurisdictional challenges at the European meeting on the previous day.
European Union declined to agreeing to a proposal to use approximately €140 billion in blocked Moscow funds to economically support the Ukrainian economy.
Nevertheless, the delegates consented to help support Ukraine's "financial needs" for the next two years.
The US additionally disclosed measures on Wednesday against the Russian major energy corporations, Rosneft and Lukoil Corporation, as part of efforts to add monetary leverage on Moscow to enter ceasefire negotiations.
Russia launched its full-scale invasion of Ukrainian territory in winter 2022. Russian troops at this time occupies about one-fifth of the country's land, encompassing the Crimean peninsula Russia seized in 2014.