Email from Chrishan Kamalan (Deputy Director COVID-19, Welsh Government) to Andrew Goodall (Director General for Health & Social Services, Welsh Government), Rob Orford (Chief Scientific Adviser for Health, Co-Chair of the Technical Advisory Cell and Technical Advisory Group, Welsh Government) and colleagues, regarding COBRA(M) at 17h Sunday 22nd followed by Prime Minister announcement on shielding, dated 21/03/2020.