Typical

I got an email from my manager today regarding my National Insurance number. The one she helped me apply for on my very first day of work, meaning Feb 22. It is now 3 months later, and they have sent back a letter saying, due to a change in legislation, the application I had filled out is not valid, can I please fill in the new form they have sent and then send it back. Honestly, I can't see that the new form has changed at all, but what do I know?