On 9 March 2020, SAGE set out a number of non-pharmaceutical interventions that could in due course be introduced by the Government. SAGE advised that “measures relating to individual and household isolation will likely need to be enacted within the next two weeks to be fully effective, and those concerning social distancing of the elderly and vulnerable 2–3 weeks after this”.116 On 12 March 2020, the Prime Minister said that anyone with a new continuous cough or a fever should self-isolate for seven days.117 Household isolation was announced on 16 March 2020.118 112 Edge Health, Understanding the role of large gatherings on the NHS, 28 May 2020. The analysis states that their findings cannot be used to establish causality 113 GOV.UK, SAGE 13, 5 March 2020 114 London School of Hygiene & Tropical Medicine, Considerations for NPI Policy – timing and sub-national targeting, 5 March 2020 115 London School of Hygiene & Tropical Medicine, Considerations for NPI Policy – timing and sub-national targeting, 5 March 2020 116 GOV.UK, Potential impact of behavioural and social interventions on an epidemic of Covid-19 in the UK, 9 March 2020 117 GOV.UK, ‘Prime Minister’s statement on COVID-19: 12 March 2020’, accessed 17 September 2021 118 GOV.UK, ‘Prime Minister’s statement on coronavirus (COVID-19): 16 March 2020’, accessed 17 September 2021 36 Coronavirus: lessons learned to date