HMS London was a two-decker 90-gun second rate ship of the line

Ship of the line

A ship of the line was a type of naval warship constructed from the 17th through the mid-19th century to take part in the naval tactic known as the line of battle, in which two columns of opposing warships would manoeuvre to bring the greatest weight of broadside guns to bear...

 of the Royal Navy

Royal Navy

The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

, launched on 28 September 1840 at Chatham Dockyard

Chatham Dockyard

Chatham Dockyard, located on the River Medway and of which two-thirds is in Gillingham and one third in Chatham, Kent, England, came into existence at the time when, following the Reformation, relations with the Catholic countries of Europe had worsened, leading to a requirement for additional...

.

In 1854, London took part in the bombardment of Fort Constantine at Sevastopol

Sevastopol

Sevastopol is a city on rights of administrative division of Ukraine, located on the Black Sea coast of the Crimea peninsula. It has a population of 342,451 . Sevastopol is the second largest port in Ukraine, after the Port of Odessa....

 during the Crimean War

Crimean War

The Crimean War was a conflict fought between the Russian Empire and an alliance of the French Empire, the British Empire, the Ottoman Empire, and the Kingdom of Sardinia. The war was part of a long-running contest between the major European powers for influence over territories of the declining...

, where she sustained damage.

In 1858 she was converted to screw propulsion, and reduced to 72 guns.

By 1873, she was a hulk

Hulk (ship)

A hulk is a ship that is afloat, but incapable of going to sea. Although sometimes used to describe a ship that has been launched but not completed, the term most often refers to an old ship that has had its rigging or internal equipment removed, retaining only its flotational qualities...

, serving as a depot ship in Zanzibar

Zanzibar

Zanzibar ,Persian: زنگبار, from suffix bār: "coast" and Zangi: "bruin" ; is a semi-autonomous part of Tanzania, in East Africa. It comprises the Zanzibar Archipelago in the Indian Ocean, off the coast of the mainland, and consists of numerous small islands and two large ones: Unguja , and Pemba...

 Bay, off the east coast of Africa. In March 1878 she was recommissioned, and involved in the suppression of the slave trade in the area, serving as a central depot for many smaller steam screw boats; she functioned as a repair depot, a hospital and a storage ship. At this time there were Africans from West Africa (Kroomen or Krumen) and East Africa (Seedies

Seedies and Kroomen

Seedies and Kroomen were African sailors recruited locally into the British Royal Navy in the 19th and early 20th century....

 or Sidis) serving onboard. There were also Zanzibari and Arab interpreters and cooks from Portuguese Goa (India).

Captained by Charles J Brownrigg, this vessel and her crew made several patrols aimed at hindering the slave trade and, on 3 December 1881, caught up with a slave dhow captained by Hindi bin Hattam. This dhow had around 100 slaves on board and was transporting them between Pemba and Zanzibar. Captain Brownrigg led a boarding party to release the slaves but bin Hattam's men then attacked the sailors, killing Brownrigg and some of his party before sailing away. Sir Lloyd William Mathews

Lloyd Mathews

Sir Lloyd William Mathews KCMG, CB was a British naval officer, politician and abolitionist. Mathews joined the Royal Navy as a cadet at the age of 13 and progressed through the ranks to lieutenant. He was involved with the Third Anglo-Ashanti War of 1873–4, afterwards being stationed in...

led a force to Wete on Pemba and, after a short battle, took a mortally wounded bin Hattem (Hindi-bin-Khartoum) prisoner before returning to Zanzibar.

The final entry in the ships log is dated the 22nd of January 1883. Captain Luxmoore writes "Paid ship off" "Sent ships company to transport Windsor Castle in passage to England".

In 1884 she was sold and broken up.