Quarant'ore at the London Oratory begins tomorrow (1 April) at 6.30pm with Solemn Sung Mass of Exposition and Procession of the Blessed Sacrament. On Wednesday 2 April there is Holy Hour and Benediction at 6.30pm, and on Thursday 3 April at 7pm, the Oratory Choir will sing Mendelssohn's Lauda Sion followed by Solemn Benediction to close the Forty Hours. Full details are here, and there are photographs from last year's Quarant'ore here.