There was cooperation in Asia, however, as the two countries joined many others to protect their interests in China during the Boxer Rebellion (1899–1901).

Britain was an ally of Japan after 1902, but remained strictly neutral and did not participate in the Russo-Japanese War of 1904–5.

However, there was a brief war scare in the Dogger Bank incident in October 1905 when the main Russian battle fleet, headed to fight Japan, mistakenly engaged a number of British fishing vessels in the North Sea fog.
The Russians thought they were Japanese torpedo boats, and sank one, killing three fishermen.
The British public was angry but Russia apologised and damages were levied through arbitration.

Diplomacy became delicate in the early 20th century.
Russia was troubled by the Entente Cordiale between Great Britain and France signed in 1904.
Russia and France already had a mutual defense agreement that said France was obliged to threaten Britain with an attack if Britain declared war on Russia, while Russia was to concentrate more than 300,000 troops on the Afghan border for an incursion into India in the event that Britain attacked France.
The solution was to bring Russia into the British-French alliance.
The Anglo-Russian Entente and the Anglo-Russian Convention of 1907 made both countries part of the Triple Entente.
The Convention was a formal treaty demarcating British and Russian spheres of influence in Central Asia.
It enabled Britain to focus on the growing threat from Germany at sea and in central Europe.
The Convention ended the long-standing rivalry in central Asia, and then enabled the two countries to outflank the Germans, who were threatening to connect Berlin to Baghdad with a new railroad that would probably align the Turkish Empire with Germany.
 The Convention ended the long dispute over Persia.
Britain promised to stay out of the northern half, while Russia recognized southern Persia as part of the British sphere of influence.
Russia also promised to stay out of Tibet and Afghanistan.
In exchange London extended loans and some political support.
The Convention led to the formation of the Triple Entente.
There was cooperation in Asia, however, as the two countries joined many others to protect their interests in China during the Boxer Rebellion (1899–1901).
Britain was an ally of Japan after 1902, but remained strictly neutral and did not participate in the Russo-Japanese War of 1904–5.
However, there was a brief war scare in the Dogger Bank incident in October 1905 when the main Russian battle fleet, headed to fight Japan, mistakenly engaged a number of British fishing vessels in the North Sea fog. The Russians thought they were Japanese torpedo boats, and sank one, killing three fishermen. The British public was angry but Russia apologised and damages were levied through arbitration.
Diplomacy became delicate in the early 20th century. Russia was troubled by the Entente Cordiale between Great Britain and France signed in 1904. Russia and France already had a mutual defense agreement that said France was obliged to threaten Britain with an attack if Britain declared war on Russia, while Russia was to concentrate more than 300,000 troops on the Afghan border for an incursion into India in the event that Britain attacked France. The solution was to bring Russia into the British-French alliance. The Anglo-Russian Entente and the Anglo-Russian Convention of 1907 made both countries part of the Triple Entente. The Convention was a formal treaty demarcating British and Russian spheres of influence in Central Asia. It enabled Britain to focus on the growing threat from Germany at sea and in central Europe. The Convention ended the long-standing rivalry in central Asia, and then enabled the two countries to outflank the Germans, who were threatening to connect Berlin to Baghdad with a new railroad that would probably align the Turkish Empire with Germany.  The Convention ended the long dispute over Persia. Britain promised to stay out of the northern half, while Russia recognized southern Persia as part of the British sphere of influence. Russia also promised to stay out of Tibet and Afghanistan. In exchange London extended loans and some political support. The Convention led to the formation of the Triple Entente.
Russia–United Kingdom relations