The bombardment, according to US and UK military sources, was done "in self-defence" and to "disrupt and degrade" the group's ability to strike ships in the Red Sea.

The US has carried out its eighth round of airstrikes against Houthi targets in Yemen on Monday at 11.59pm local time.

US military officials said the strikes were successful and had “good impacts” in all eight locations.

The UK joined the airstrikes for the second time in 10 days.

The Pentagon said the operation targeted a Houthi underground storage site as well as missile and air surveillance sites.

A joint statement from both countries said that they had conducted strikes against eight Houthi targets in Yemen 

The UK involvement on Monday appears to have been smaller than 11 January’s strikes.

Ten days ago, US and UK warships and jets hit more than 60 targets in 28 locations.