The Freedom of Information Act 2000

The Freedom of Information Act 2000 is an Act of the Parliament of the United Kingdom that creates a public “right of access” to to government-held information. The intent is to allow private individuals and corporations reasonable access to information while minimizing the risk of harm to any entity. The concept was first put forward in 1997, was passed in 2000 and came into full effect in 2005. You can access the official document here.