Inclusion Criteria:  Patient stable for at least 6 hours with at least one of the following:  NEWS2 <= 2 and (in some exceptional NEWS >2 confirmed with clinical staff, eg. patients with comorbidities). Frequency of observations of >4 hours at the time of randomisation. Participant is willing and able to give informed consent for participation in the trial. Male or Female, aged 18 years or above. Any patient admitted to the participating surgical unit (including post-ICU patients) who are not currently monitored with standard continuous monitoring  Exclusion Criteria:  The participant may not enter the trial if ANY of the following apply:  Intra-cardiac device Monitored for less than 24 hours