The Northern School of Music's production of Dream of Gerontius, by Elgar. It's a huge work for orchestra and choir, based on a poem by John Henry Newman. It tells the story of a dying man's last prayer and journey to Purgatory. Gladys Williams, double bassist at the school, remembers it with the "big angels" and the "amazing crescendo" which was so powerful that she had to look at the audience to make sure they hadn't got up.
Part of the #NSM2020 project "A 20/20 Legacy: the centenary of the Northern School of Music" supported by the National Lottery Heritage Fund.