HMS Diamond is part of the Operation Prosperity Guardian task force seeking to deter attacks from Iran-backed Yemeni rebels on commercial vessels in the busy Bab al-Mandeb strait.

The United States announced the 10-nation coalition on Monday, promising a multinational response to the Huthi drone and missile strikes disrupting shipping.

"These illegal attacks are an unacceptable threat to the global economy, undermining regional security and are threatening to drive up fuel prices," said UK Defence Secretary Grant Shapps.

"This is an international problem that requires an international solution. That is why HMS Diamond has joined Operation Prosperity Guardian.

"This new task force will protect shipping and vital trade routes in the Red Sea, where large amounts of goods and oil transit through to Europe and on to the UK."

Shapps sent HMS Diamond to the region last month to join the frigate HMS Lancaster, three mine hunters and a Royal Fleet Auxiliary support ship as part of the UK's longstanding maritime presence in the Gulf.

It arrived in the Red Sea at the weekend and on Saturday shot down a suspected Huthi attack drone that was tracking commercial shipping, the Ministry of Defence said.

Prime Minister Rishi Sunak's spokesman told reporters: "We are confident that a task force with the US UK navies in particular and with our French allies provides considerable capacity to deter future attacks and protect commercial shipping."