@Social Misfit it’s mandatory in scotland from yesterday (i think) in shops and public transport. My wife went into waitrose yesterday and they gave her a paper one at the door. See this page on the scot.gov website.
https://www.gov.scot/publications/c...e-and-protecting-others/pages/face-coverings/
But there is this paragraph on exemptions, so you should be okay.
- you have a health condition or you are disabled and a face covering would be inappropriate because it would cause difficulty, pain or severe distress or anxiety or because you cannot apply a covering and wear it in the proper manner safely and consistently. Individual discretion should be applied in considering the use of face coverings for other children including, for example, children with breathing difficulties and disabled children who would struggle to wear a face covering