The seventh Royal Navy ship to be named HMS Dreadnought was the United Kingdom's first nuclear-powered submarine, built by Vickers Armstrongs at Barrow-in-Furness.

The excellent relations between Admiral Mountbatten and US Navy Chief of Naval Operations Arleigh Burke, expedited obtaining that help.

[1] During Dreadnought's construction, Rolls-Royce, in collaboration with the United Kingdom Atomic Energy Authority at the Admiralty Research Station, HMS Vulcan, at Dounreay, developed a completely new British nuclear propulsion system.

Three torpedoes hit along the length of the target, but the gunners of HMS Salisbury, a frigate, completed the task by piercing the tanks which were just keeping Essberger Chemist afloat.

On 10 September 1970, she completed a major refit at Rosyth, in the course of which her nuclear core was refuelled and her ballast tank valves were changed to reduce noise.

[12] While participating in the exercise under the command of CO Alan Kennedy, on 3 March 1971, Dreadnought became the first British nuclear submarine to surface at the North Pole.

In November 1977, while under the command of CO Hugh Mitchell, she diverted from a planned 8-month deployment to Australia to proceed to Gibraltar and then to the South Atlantic.

[15] Due to machinery damage and the limited refit facilities then available for nuclear fleet submarines, Dreadnought was withdrawn from service in 1980.

Dreadnought is now at Rosyth Dockyard, laid up in afloat storage until she can be safely disposed under the auspices of the UK Ministry of Defence (MOD)'s Submarine Dismantling Project (SDP).