Prime Minister Keir Starmer announced on Tuesday that he was deploying HMS Dragon, a Type 45 defence destroyer to aid Britain's "defensive operations" in the region.

Starmer also said he was sending two Wildcat helicopters with counter-drone capabilities.

The announcement came after several drone attacks from Iran targeted UK allies in the Middle East and after the UK Royal Air Force base Akrotiri was struck overnight Sunday to Monday.

Opposition lawmakers have accused the government of being too slow to deploy additional resources after the war started on Saturday with no British warship in the region.

The destroyer is being resupplied with ammunition and will sail next week, the officials told reporters in London.

"We've had to change weapon systems on it, finish welding, get it up and running, and get it sailing as fast as possible," Defence Minister Al Carns told Sky News.

Its voyage to the eastern Mediterranean is expected to take several days.

Starmer refused to allow the Americans to use UK air bases to launch the initial strikes on Iran on Saturday.

He later agreed to a US request to use two British military bases -- one in southwest England and the other in the Chagos Islands in the Indian Ocean -- for a "specific and limited defensive purpose".

The officials said Wednesday that US bombers have not yet used those bases to launch missions but they are expected to do so in the coming days.

They also said that the drone, which caused little damage and no casualties when it hit the runway at Akrotiri, had not been launched from Iran.

A Cypriot government source said Monday that the drones had been launched from Lebanon, "most likely" by Hezbollah, a historical ally of Iran in the Middle East.