Room 11. Detailed view of the 'Glowpot' desk, originally designed as an outside broadcast (OB) mixer by Johnny Longden, with its modified 'quadrant' faders, some ganged together with metal clips. To the upper left are miniature PEUs, whilst foldback, echo and channel groups are selected on the right. The ADJUST ZERO controls accommodated any ageing of the lamps in the noiseless fader circuits.