Concert in memory of Nick Gale, who was the cathedral's director of music 2000-2013, and was killed in a road accident in March 2015.
The concert will include choral and organ music, as well as jazz, and will conclude with movements from Duruflé's Requiem.
Organists taking part include Stephen Disley, Duncan Appleby, Nicholas O'Neill and Mervyn Hogg.
Admission is free and there will be a retiring collection toward chorister training at St George's Cathedral. All are welcome to attend.