We are aware that EasyJet are asking passengers who believe themselves to be exempt from wearing face masks on public transport, are to bring a signed doctor’s letter or medical certificate. The airline’s guidance can be viewed here.
There is no legal requirement for anybody to provide medical evidence that they are exempt from wearing a mask. Producing such evidence on behalf of patients is not core GP activity, nor is it a good use of GP time in the midst of a pandemic.
The Government’s list of reasons people are exempt from wearing masks can be viewed here. For further evidence of such exemptions, the Government guidance states: “…if you rely on an exemption, transport staff should not ordinarily ask for evidence”.