Data Protection and Freedom of Information
If you wish to obtain information about yourself, the Data Protection Act 1998 will apply and you should make a 'Subject Access Request.' See the Privacy and Data Protection page for more information.
Freedom of Information
If the information that you are looking for is not about you, but is related to a public authority then the Freedom of Information Act 2000 will apply.
The Act gives you a general right of access to 'recorded' information held by public authorities.
See the Freedom of Information page for more information.