Sabina Cvilak sang this in Ryde on the centenary of the composer's birth. That composer and Bla Bartk are not from the same country.
Edward Benjamin Britten, Baron Britten {'1': ", '2': ", '3': ", '4': "} (22 November 1913 4 December 1976) was an English composer, conductor and pianist. 
Bla Viktor Jnos Bartk ( ; ] ; 25 March 1881  26 September 1945) was a Hungarian composer, pianist and an ethnomusicologist. 
The War Requiem, Op. 
 She is also known for singing concerts and recitals, such as Britten's "War Requiem" in London on the centenary of the composer's birth. 
