An official file on a £1.3 billion Royal Navy submarine was reportedly found dumped within the bathrooms of a Wetherspoon pub.

It's claimed recordsdata marked 'official delicate' in regards to the HMS Anson had been left in The Furness Railway in Cumbria.

Documents apparently confirmed the interior workings of the 'hunter killer' and had been utilized by submariners studying the right way to isolate and depressurise parts of its system.

However, Royal Navy officers mentioned that recordsdata did not include labeled materials and paperwork was all generic.

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A BAE programs shipyard relies a brief distance from the Furness Railway, in Barrow-in-Furness, the place the submarine has beforehand been pictured, The Sun studies.

A naval supply mentioned: “These documents enable submariners and contractors to understand how systems interact. They do not detail how they work, just that they exist.”

The insider additionally defined that the file solely contained primary designs of the programs on board HMS Anson with out detailing how they work.

The vessel is the fifth of the brand new Astute-class assault submarines to affix the Royal Navy fleet.

They are able to firing tomahawk missiles and described because the “largest, most advanced and most powerful attack submarines” ever used within the navy on its web site.

A Royal Navy spokesman mentioned: “These are generic training documents that carry no classified information. However, we take all security matters extremely seriously and will investigate the circumstances of their discovery.”