Navy
Royal Navy's 'Water Robot Wars' Underway
What the Navy describes as its first "robot wars" are fully under way off the coasts of Scotland and west Wales.
Unmanned Warrior features more than 50 vehicles, sensors and systems on the surface of the sea, underwater and in the air.
The whole event is being monitored closely at Portsdown Technology Park in Portsmouth, where a number of the Royal Navy's latest innovations are born.