We have been receiving some requests for mask exemption certificates but these are not something that the Doctor will be issuing. The vast majority of people can and should wear a face covering or mask to protect themselves and others. It can take a little bit of time getting used to, so practicing at home can be useful.
A small proportion of patients will have severe physical or mental health conditions which may make it particularly difficult for them to wear a mask. They can print out an exemption card at home from www.gov.uk.