BARROVIANS were bursting with pride as crowds lined the town's shores and docks to catch a glimpse of one of the world’s most advanced marine military vessels.

This momentous occasion saw HMS Anson, the fifth Astute class submarine, which BAE Systems has designed and built for the Royal Navy, depart the company's shipyard in Barrow and head out to open sea for the first time.

After being guided through the shipyard's dock system and rounding the tip of Walney Island, HMS Anson began her maiden journey to His Majesty's Naval Base Clyde, home of the UK's Submarine Service.

She will undertake sea trials before joining HMS Astute, HMS Ambush, HMS Artful and HMS Audacious, in operational service with the Royal Navy.

Steve Timms, managing director of BAE Systems' Submarines business, said: "It’s with enormous pride that we bid farewell to HMS Anson as she departs our site to take up her vital role helping to protect the UK's national security.

The Mail: The magnificent vessel will be heading to ClydeThe magnificent vessel will be heading to Clyde (Image: BAE Systems)

"This is a truly national endeavour, so delivering the most capable attack submarine ever built for the Royal Navy is a tremendous moment for our company, our employees, the Barrow community and the whole of the submarine enterprise, not least our vast and crucially important UK wide supply chain."

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Barrow and Furness MP Simon Fell, who was looking on, said: "It was an honour to join the Defence Secretary, and the team at BAE who were responsible for HMS Anson, as she left for open waters this morning.

"Those boats are a truly remarkable achievement - keeping us and our allies safe in the most inhospitable circumstances.

"There are only a handful of places on earth who can deliver a complex engineering challenge like Astute - we should be very proud that Barrow is one of them."

Ben Wallace, Secretary of State for Defence, said: "HMS Anson will play a vital role in defending the UK, providing a competitive edge for decades to come, and I am proud to see her make her journey up to her permanent home on the Clyde

"Supporting tens of thousands of jobs across the UK, our Astute-Class submarines are a leading example of our commitment to defence manufacturing, continuing to boost British industry for decades to come."

HMS Anson, which was formally commissioned into the Royal Navy during a ceremony in Barrow last year, is 97 metres long and weighs 7,400-tonnes.

The Mail: The submarine leaving its iconic birthplaceThe submarine leaving its iconic birthplace (Image: BAE Systems)

The Astute class are equipped with world-leading sensors, carry Tomahawk Land Attack Cruise Missiles and Spearfish heavyweight torpedoes and can circumnavigate the globe submerged, producing their own oxygen and drinking water.

BAE Systems has delivered the first four submarines in the Astute class and the sixth and seventh boats are at an advanced stage of construction in Barrow.

The Dreadnought class submarines, which will replace the Royal Navy's Vanguard class, carrying the UK's independent nuclear deterrent, are also being designed and built in Barrow with manufacturing work underway on the first three of four boats.