www.legislation.gov.uk/uksi/2020/1200/pdfs/uksi_20201200_en.pdf
I appreciate there are many different ways people will try to reduce the virus for moral reasons and that’s all for the good where people are able to do that. We will all be in different situations.
But as far as what we can expect of other people and get annoyed about.... might help if everyone read the law. If another person is keeping to the actual law but not your personal judgement then have a chat about it fine, but it’s a difference of opinion not something you can claim complete authority on. Since the law is the authority in this case.