It's not just tech companies...the UK government wants its
citizens to follow new rules of acceptable behaviour...with nightclubs "voluntarily" checking for double jab status before letting people in. "Voluntarily" in this context meaning "you either do it or we make you do it"...just for clarity.
And then that could expand to other "venues where large groups assemble"...like supermarkets and stores you mean??
Looks like your iPhone isn't the only thing that the UK government wants the ability to side load things on...looks like your body is fair game too if you are unfortunate enough to live in the United "Brave New World of 1984" Kingdom