A transparency campaign from 
Blocked will check if a site is being blocked by instantly running tests on major fixed line ISPs and mobile networks. Based on the results, you can submit a request to the ISPs to have the site reclassified and removed from their block lists.
Has this site been blocked incorrectly?
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Mobile and broadband Internet Service Providers (ISPs) have created filters to stop under 18s from seeing harmful content online. Unfortunately, filters block many harmless websites by mistake - even sites that are aimed at children! Often website owners don't know that this is happening.
Around 3.5 million households have filters switched on, through choice, or by default. In addition, many mobile phone users have filters enabled as they are on by default.
We need people to use this tool to check and report sites that shouldn't be filtered. Not only will you be helping website owners, you will also increase transparency about filters by helping us to get a clearer picture about overblocking.
Many people aren’t aware of the extent of overblocking. Please share the Blocked tool to help raise awareness and correct mistakes.
