It will replace riveted plate fuel tanks, some over 100 years old that are approaching their end of service life.

Tanks will be cut down individually and replaced in rows of two at the site, allowing the Navy to maintain operational fuel reserves during the rebuild.

The project will ensure that the depot will be fully equipped to meet the future requirements of the Royal Navy’s new Queen Elizabeth Class carriers.

Around six primary storage tanks with 5 smaller supporting tanks will be built alongside associated pipework and fuel delivery systems.