Mga email sa pagitan ng Assistant Head of Countermeasures Supply and Operations Immunisation and Countermeasures Service (National Infection Service, PHE), RWCS Team Covid-19 Incident (DHSC), Amy Tortoishell (Office for Life Sciences, DHSC), at iba pang mga tatanggap, tungkol sa posisyon ng FFP3, na may petsang 12/03/2020.