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The country's leader, Kim Jong Un, had reacted furiously to the warship's failed launch in May, and demanded it be quickly repaired.

North Korea has launched a warship two weeks after it was damaged during an earlier launch attempt, in an incident that drew harsh criticism from the country's leader Kim Jong Un.

Seoul is hoping it can use this expertise to build, repair and maintain warships for the US, and in the process convince Washington it is a valuable partner.

There will still be "heavy metal", such as tanks, fighter jets and warships, but working more alongside autonomous systems.

A Royal Navy warship has swooped in on a vessel which was carrying £30m worth of illegal drugs.