The part that I find extraordinary is the authentication process for the first UK passport (like after acquiring a citizenship). They don't have an old photo to compare to, they won't look at a foreign ID either. So the authentication process consists in asking me a series of personal questions (that I know they don't know the answer to because I never gave it to them at any point in the process) and look at me in the eye to assess whether I am truthful.
Welcome to the world where your government does not actually have a proper, audited, secure and centralized database of all its citizens. Even third-world countries have it better.