Its main feature is a central bronze sculpture by Belgian sculptor Victor Rousseau, who himself spent time as a refugee in London during the war.
The central group is sheltered by a curved screen wall of Portland stone, which bears two further relief sculptures (now quite worn) representing "Justice" (left) and "Honour" (right).
It was unveiled by Princess Clémentine of Belgium at a ceremony on 12 October 1920, the fifth anniversary of the execution of British nurse Edith Cavell in Brussels.
The ceremony was attended by the Prime Minister of Belgium Leon Delacroix, and the gift was formally accepted on behalf of the British nation by Lord Curzon.
In response, an Anglo-Belgian Memorial was erected in Brussels in 1923, designed by British sculptor Charles Sargeant Jagger.