What the Government Actually Thinks About Muzzles

���The evidence of the benefit of using a face covering to protect others is weak and  the effect is likely to be small���.

HM Government

 

From ���Keeping workers and customers safe during COVID-19 in restaurants, pubs,

 bars and takeaway services. Covid-19 secure guidance for employers, employees

and the self-employed 23 June 2020���

P.35

https://assets.publishing.service.gov.uk/media/5eb96e8e86650c278b077616/Keeping-workers-and-customers-safe-during-covid-19-restaurants-pubs-bars-take...