Recognition (UK). This article gives information on recognition of nonbinary gender identities in law, government, services, and businesses in the United Kingdom (UK). This also deals with policies about transgender people in general, and related policies about intersex people. Recognition here means whether an organization acknowledges that such people exist and have valid identities, and the organization does this by routinely giving them a place where they aren't forced into being wrongly categorized as a gender that doesn't match their gender identity. In the case of recognition of nonbinary people, this means the system doesn't force them to wrongly say they are one of the binary genders (female or male).
Follow to find lists of organisations in each category, with status on nonbinary acceptance and evidence.
You can find a PDF of some of the evidence here: 
- Deed poll services
- Educational bodies
- Entertainment services
- Health and medical
- Local Government
- National Government (includes NHS)
- Utility Companies
- Veterinary surgeries and related services
- Websites and online services specific to the UK
- Legal gender (UK)
- Websites and social networks, which is international.
- Recognition (Canada)
- Recognition (USA)
- Practical advice for the non-normatively gendered, by CN Lester. Advice specifically for nonbinary people living in the UK regarding their legal status, filling in forms, and organisations.