Located in the Solent, near Portsmouth, England, and is now in private ownership following its sale after a period as a luxury hotel.

The four armour-plated forts were designed by Captain E. H. Stewart overseen by Assistant Inspector General of Fortifications, Colonel W. F. D. Jervois.

[2] In 1898 the role of the fort was changed to defend against light craft and the roof was fitted out with two 4.7" guns and searchlights.

Life on site was grim; those serving were deliberately chosen for their inability to swim, to avoid any attempt to escape".

[10] The fort was remodelled, with works reportedly costing around £2.6 million,[3] and opened in 2012 as a luxury spa hotel and retreat with nine bedroom suites.

[11][12] A 2018 report however, stated that Spitbank, "largely undamaged, has been protected from inappropriate development by its status ... as a Scheduled Ancient Monument and the designers have been scrupulously careful to preserve ... all the fitments...".

[3] On September 14, 2020,[15] Pendulum recorded a concert at Spitbank Fort to promote their new single Driver/Nothing for Free that was streamed live on YouTube on October 2, 2020.