Excalibur! UK Royal Navy unveils 12m uncrewed sub

Over the next two years, Excalibur will carry out extensive sea trials to help develop a better understanding of the unique challenges that come with operating uncrewed vessels of this size – with the aim of future vessels working alongside crewed platforms.

"The trials and testing will contribute significantly to the Royal Navy’s constant efforts to remain ahead of potential foes beneath the waves, safeguarding key infrastructure, protecting British and allied ships and submarines and gathering intelligence," said the navy.