What French composer and pianist had the first British performance of their Organ Concerto in Chichester Cathedral in 1943?
Anne Maddocks:  She gave the first British performance of Poulenc's Organ Concerto in Chichester Cathedral in 1943. Francis Poulenc: Francis Jean Marcel Poulenc (] ; 7 January 189930 January 1963) was a French composer and pianist.
Francis Jean Marcel Poulenc