Just in passing.
Some years ago I was involved in a case where police discovered 300+ cases where genuine British Passports had been issued as a result of false information supplied. The Passport office had not detected the false info and had thus issued genuine British passports. From our estimation at the time there were probably thousands of such passports, all of which could be renewed 'legally' and which no doubt are still being used. once issued they were practically undetectable. The system for obtaining them was wide open. It still maybe as nothing at that time was put in place to prevent it.