"BAE Systems has today marked the start of construction of the third Dreadnought class submarine Warspite at its shipyard in Barrow-in-Furness, Cumbria," the release said.
Warspite is the third of four Dreadnought class ballistic missile submarines being designed and built by BAE Systems, the company stated.
"Due to enter service from the early 2030s, the boats will carry the UK's nuclear deterrent and be the biggest, most powerful and technically advanced submarines ever delivered to the Royal Navy," BAE said in the press release.
Construction of the first two submarines, Dreadnought and Valiant, is already well underway, the company added.
UK Defense Procurement Minister Alex Chalk described the Dreadnought class submarines as crucial to maintaining the nation's national security, according to the release.