Starmer, who has faced ?pressure from critics at home and from US President Donald Trump over what ?support to provide for the strikes on Iran, said reopening a waterway that ?is vital for oil and liquefied natural gas was key to stabilising energy markets.
He also set out the first financial support as a result of the conflict, a 53-million-pound ($70.30 million) ?package for the most vulnerable households that rely on heating oil, an energy ?source that has spiked after the launch of the conflict.
Trump said at the weekend that ?he ?wanted allies, including China, France, Japan, South Korea, Britain and others, to send ships to the area to keep the Strait open and safe.
Starmer told a press conference on Monday that ultimately the Strait of Hormuz had to be reopened ?to "ensure stability in ?the (oil) market". But ?he added: "That is not a simple task".
"So we're working with all of our allies, including our European partners, to bring ?together a viable collective plan that can restore freedom ?of navigation ?in the region as quickly as possible and ease the economic impact."
About a fifth of global oil and liquefied natural gas normally passes through the strait, a narrow ?passage ?of water between Iran and Oman. Tehran's ability ?to stop shipping through the channel could give it enormous leverage over the US and its ?allies.