I don't agree with you. If and when we get case numbers very low (we live in hope, keeping a wary eye on Europe's third wave) we won't need them. By then, the only role of vaccine passports would be to nobble vaccine deniers. I don't like vaccine deniers but I don't want the government to enact laws that are matters of somebody's principle rather than matters of pragmatism. It is not against the law to refuse a vaccine, and passports would discriminate against people who are not lawbreakers. They would also discriminate against people who, for one reason or another, are fearful of the vaccines. We already know that there is a large disparity in proportions between the vaccine-worried in white and black communities, for all sorts of reasons. Vaccine passports would readily be seen as carrying racist connotations. On top of all this, it would be unconscionable to introduce them before everyone has been offered a vaccine. We are a long way from that aspiration at the moment and it's looking like it'll take a lot longer than the government's promised deadlines.