It seems doubtful that an organised 'travel agency' bringing in staff who have paid thousands to join U.K. brothels, drug- farms, phone-snatching gangs, car washes, unofficial night-shift factory schemes etc, will be frightened at the idea they will need an official I.D.
Shortly after the Starmer landslide, a film crew and journalists were invited to attend a raid on a carwash. But as a publicity stunt, it backfired, because the owner had been raided before, had not paid the fine, knowing that our officials never bother to collect them: He had not stopped the business or changed the staff They only need two days, from deportation to return to work, and housing, as before.
Two days is also all it takes for deported, seriously violent criminals, to return to U.K., including repeatedly imprisoned and deported, obsessed, knife-carrying stalkers. Our officials don't bother to have any system to stop them.
(Our officials also don't bother to have any system to count who leaves, so anyone arriving on a brief holiday visa can remain forever, while our O.N.S. brazenly publishes 'net' immigration numbers as if they are factual.)
France officially has I.D. cards. But there are masses in France 'sans papiers'. Germany too, and after Merkel threw open her borders, and locals protested at the resulting invasion, the immigrants taunted protesters, by making street bonfires of their nice new German documents, pointing out correctly that the protesters pay for all the charities and government officials who would rush to issue new documents as fast as the incomers requested it. You or I couldn't get fake, duplicate, or genuine but falsified documents. But criminals could.
U.K. officials do not bother to exchange information on criminal records, or fingerprint details, with any other country. Nor of course do they bother to ask if anyone they are about to give 'asylum' has already been given it, or been found not to qualify for it, in some, or several, of the countries s/he has lived in, along the journey to U.K.
Discrimination against physically disabled people in U.K. is ignored. Discrimination against old people in U.K. is government policy. Old people and disabled people will be vastly disproportionately disadvantaged by being ordered to use smartphones.
They are the poorest. They are the least likely to be able to have enough manual dexterity. They are the most likely to be overwhelmed and fearful and to have nobody to teach them, repeatedly, to do something which is as alien to them as suddenly piloting a plane. They are not wrong, in being deeply suspicious of hacking and scams and potential disasters.
Outages will happen. Nation-wide, signal coverage is not complete, or of adequate strength. Hacks will happen. Criminals will obtain data. Officials will be corrupt. Power will be abused.