About

451 Unavailable is trying to make the legal blocking of websites more transparent.

The 451 Unavailable project aims to:

• Encourage ISPs to show an Error 451 page when customers visit a site that is blocked for legal reasons with links to relevant court orders and judgments
• Encourage courts to publish court orders by default and be fully transparent about which websites are being blocked and why
• Build a team of legal professionals who request and analyse court orders so that we can document website blocking in the UK (with expansion into Europe and the rest of the world)
• Work with tech companies, ISPs, rights holder groups and Government to build sensible limits for blocking and reduce the scope of widespread blocking

Error 451 Unavailable Logo licence

If you wish to use the 451 Unavailable logo for your Error 451 pages, please do so, atributing the logo as available under a cc-by licence, by linking to this page.