TO THE MEMORY OF 2152 OFFICERS, NON-COM. OFFICERS AND PRIVATES OF THE
BRIGADE OF GUARDS
WHO FELL DURING THE WAR WITH RUSSIA IN 1854–56.
ERECTED BY THEIR COMRADES

A monument placed in 1861, made by John Bell, came to mark the victory of Great Britain, France and the Ottoman Empire over the Russian Empire (1853-1856).

The monument depicting 3 soldiers, and a symbolic figure of a woman above them, was photographed on the same day Click for a larger image
The 3 soldiers were created from the casting of fallen Russian cannons

Another label on the base of the statue indicates that it was moved to a nearby location in 1914 to make room for Florence Nightingale’s statues Click for sign's details and Sidney Herbert Click for sign's details.
THE GUARDS’ MEMORIAL WAS PULLED DOWN IN THE YEAR OF OUR LORD 1914 AND WAS RE-ERECTED 30 FEET NORTH IN ORDER TO PERMIT THE ERECTION OF THE FLORENCE NIGHTINGALE AND SIDNEY HERBERT STATUES
Click for a larger image

The word is engraved on the side of the monument
CRIMEA
Click for a larger image

Another plaque mentions the Battle of Inkerman, a battle following which the siege of Sevastopol began
ALMA INKERMAN SEBASTOPOL
Click for a larger image

As you can see in the attached image, the three monuments related to the Crimean War are in the same area Click for a larger image:
Statue commemorating Sidney Herbert Click for sign's details
Statue commemorating Florence Nightingale Click for sign's details