The case was designed by Stephen Bicknell after the manner of the distinguished English organ-builder and designer Arthur Hill, whose work can be seen at Chichester and Peterborough Cathedrals and at Sydney Town Hall, Australia. Layout and technical design of the instrument was also executed by Stephen Bicknell as part of the Mander design team. The organ has four manuals and the key action is mechanical.

The appearance of this instrument is deceptive. The arch under the west tower is only three metres (ten feet) wide and considerable ingenuity was excercised to make the forty stop organ fit in the space available. The largest pipe in the case speaks low E in the 8ft octave; some Great organ basses are mounted horizontally in the tower caps, and the entire pedal organ is divided on either side in inconspicuous cases of its own.

More photos of the organ at Chelmsford

Mander Organs