Sir Keir Starmer is expected to urge allies to deliver Ukraine with more advanced missile systems to strike enemy locations during talks in Britain on the upcoming Friday.
Britain's leader plans to receive President the Ukrainian head of state alongside the so-called "coalition of the willing", consisting of more than 20 of Kyiv's partners who have agreed to offer the Ukrainian government security guarantees once a ceasefire is arranged.
Zelensky has been pleading for an extended period for more advanced missile technology from allied countries, a step that the Russian government has warned would intensify the hostilities.
President Zelensky is travelling from Belgium, where he met European Union officials on Thursday seeking economic assistance.
"The sole individual participating in the ongoing war who does not want to end the fighting is the Russian leader," Sir Keir said.
Britain's leader furthermore declare that 100 extra air defense systems will be provided to Ukrainian forces earlier than planned, as outlined in a £1.6bn deal concluded between Britain and the Ukrainian government in March.
Zelensky travels off the back of important international achievements this week: Donald Trump's decision to finally apply new measures against Russia, and the European Union deciding to support a Ukrainian budget hole.
Britain's leader is hoping to sustain the progress by intensifying the pressure on Moscow to negotiate a conclusion to the war.
Sir Keir will urge leaders to increase the supply of long-range weapons following a productive operation on a manufacturing site in the Russian city, the Russian Federation, using UK-provided advanced weaponry.
"Furthermore, his brutal assaults on young children in a nursery in recent days show that crystal clear," he continued.
Two children were part of a minimum of seven lost in multiple enemy assaults on Ukrainian territory, which hit a preschool facility in the major urban center the eastern city.
Britain's leader will discuss with Western allies on methods to withdraw Russia's petroleum resources off the global market.
Delegates will additionally consider using seized Moscow funds to provide the Ukrainian government with monetary support, while the plan faced insufficient agreement and jurisdictional challenges at the Brussels summit on Thursday.
European nations declined to approving to a proposal to use approximately €140 billion in blocked Moscow funds to monetarily assist Kyiv's finances.
Nevertheless, the delegates agreed to contribute to Kyiv's "economic requirements" for the next two years.
America additionally revealed measures on recently against Russia's biggest oil companies, Rosneft and the private firm, as element of actions to increase economic pressure on Moscow to commence ceasefire negotiations.
Moscow launched its comprehensive attack of the country in early 2022. It presently occupies about one-fifth of Ukraine's soil, encompassing the Crimean peninsula the Russian government annexed in several years ago.
Elena Marchetti is a technology journalist with a passion for demystifying complex topics. She has been covering tech trends for over a decade.