Abstract: Toilet unit (10) is located in a hospital room (12) and display (18) indicates whether occupied and if “available for use”. When the person wants to initiate the flush operation to begin, waving a hand in front of a flush-actuation sensor (34) instructs control unit (26) to start a sequence of actions including locking seat (28) and lid (26) together on the cistern, and simultaneously a delay timer (48) is initiated, set for a delay of 16 seconds being based on a flush duration of 8 seconds for a 4.5 litre flush and (8) further seconds for the miasma, generated by the flush, to subside completely. Accordingly, there is effectively or actually no risk of any contaminated or infected liquid or “miasma” water droplets exiting the cistern.