Not everyone is able to wear face coverings. If you are exempt @GOVUK have made exemption cards you can store on your phone or print if it makes you feel more comfortable to be able to show something. This is voluntary and not law.
You can find them here: https://t.co/hjP4MCh15L pic.twitter.com/gUcPff33sV
— Devon County Council (@DevonCC) September 13, 2020