Participants will have their neuromuscular function monitored using a TOF Watch. This is a neuromuscular monitor used to assess the twitch height of muscles when stimulated by small electrical currents. Assessing neuromuscular function at all stages of anaesthesia (during anaesthesia and during recovery from anaesthesia) is the standard of care and is considered "essential" as per guidelines from the Association of Anaesthetists of Great Britain and Ireland (2015).