Archchancellor Bowell's Remembrance
This is described as a small circular hall, vestibule, with an outer door with a hatch and has a raftered ceiling.
It was presuably commissioned by the late Archancellor Bowell and may have been designed by Bergholt Stuttley Johnson. It appears to work as an advanced shower cubicle with many pipes and knobbs, includeing one marked "Old Faithfull"