An identity card is like a special piece of paper that has your name, picture, and important information about you like your birthdate and where you live. The Identity Cards Act 2006 was a law made by grown-ups in the UK that said everyone should get one of these special papers.
The identity card is like a super secret code that only you and the important people know about. It helps people know who you are and what you're allowed to do. For example, if you're old enough, you can use it to buy things like alcohol or cigarettes.
Some people didn't like the idea of everyone having to get an identity card because they thought it was like someone was asking them too many questions or spying on them. So, the grown-ups decided to get rid of the law, and now, people don't have to get an identity card.