The organ at the church of Sainte-Trinite, Paris, where Messiaen was organist until his death in 1992.  More on Messiaen below. Current guidance from the Church of England allows for the organ to be played for communal church services, which recommenced earlier this month.  However there can be no congregational singing or chanting, or amateur choirs, though a single singer or cantor is permissible.  This month's Learning during Lockdown explores options for suitable organ music when the staples of the organist's repertoire—hymns, mass settings, and choral accompaniment—are excluded.  We also report on a video diary project,…