The Abbey's organ, located in the North Transept was installed in 1858 by Gray & Davison, and completely rebuilt in 1955 by J. W. Walker & Sons Ltd, though that restoration's action failed by 1987 and had to be replaced. The proposed scheme by Bishops supported by John Norman, Cecil Clutton and Patrick Moule favoured returning the organ to its Gray & Davison past but including a 'Chair' section instead of the Choir in order to try to overcome the difficulties of the position of the organ was bold but hardly in keeping historically and proved a to be musically and mechanically a disaster and increasingly unreliable so that after no more than twenty years it was necessary for the Organ to be rebuilt again in 2003/04 by Kenneth Tickell, so thoroughly as to make it effectively a new instrument in the old case. An additional nave organ was added, located under the West Window.

(Wikipedia)