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/xvu1z1z9oj pic.twitter.com/oWa3DscNvo
— Devon County Council (@DevonCC) August 27, 2020