Thomas Casson (Positive Organ Company)
1902

The Casson Organ
The Divine Office was sung daily in the Cathedral Hall from Ascension Day 1902, a year before the Cathedral’s opening. The Positive Organ Company of Mornington Crescent, London, constructed a small one-manual instrument to accompany the liturgies. On the Cathedral’s completion the following year, the organ was placed on a trolley to move it between the Blessed Sacrament Chapel to the north of the sanctuary, and the Lady Chapel to the south. Eventually, it was fitted with an electric blower and installed in a gallery above the Vaughan Chantry in the north transept, where it remains; the pipes can just be seen from floor of the Nave. Whilst the organ was used to accompany liturgies in the Blessed Sacrament Chapel as recently as 1994, it is not currently in a playable condition.
--Information from cathedral website, accessed 2025-04-11