Most of the .UK domain names are managed through Nominet UK, the domain registry for the .uk ccTLD [Country Code Top Level Domains] as well as .wales and .cymru. allthe.domains is an Accredited Channel Partner with Nominet. 

You can register .UK or any of the following domain name extensions if you fulfil certain prerequisites: 

• .uk - Open to all.
• .co.uk - Open to all.
• .org.uk - Open to all. 
• .me.uk - Open to individuals, not companies. 
• .ltd.uk - Must be a private limited company registered with Companies House and the domain name must match the company name exactly.
• .plc.uk - Must be a public limited company registered with Companies House and the domain name must match the company name exactly..
• .net.uk - Registrant must be an ISP [Internet Service Provider] or operate a network with its own ASN [Autonomous System Number].
• .sch.uk - Reserved for primary and secondary schools. Domains must be in the format of <school name>.<LEA>.sch.uk, for example "kendrick.reading.sch.uk".

You can read more about Nominet here. 

We also offer the following .UK domain name extensions which are managed by JISC. allthe.domains is an authorised domain registrar for JISC. 

• .ac.uk - for academic institutions like Universities
• .gov.uk - for parish councils, local government and central government bodies in England. 
• .gov.scot - for parish councils, local government and central government bodies in Scotland. 
• .gov.wales - for parish councils, local government and central government bodies in Wales. 
• .llyw.cymru - for parish councils, local government and central government bodies in Wales.