Domain Audit
Provides domain asset management services for businesses, consultancy and domain name recovery.
http://www.domainaudit.com

Domain Watcher
Tracks deleted, expired, on hold and detagged domains and notifies subscribers when their chosen domain becomes available to register.
http://www.domain-watcher.com

Domains Directory
Searchable, categorised listings of uk domain names for sale, also listed alphabetically. Many domain names are unpriced, and enquiries are solicited from potential buyers.
http://domainsdirectory.co.uk

Headpoint.com
Offers a directory listing of domain names for sale, registration of new domain names, web hosting and search engine submission
http://www.headpoint.com

INCOP
Project of Nominet UK to establish a Code of Practice (CoP) for domain name registration services, initially in the .UK registry, in order to improve standards and consumer confidence.
http://www.incop.org.uk

My Domain Name
Offers domain names categorised by topic for sale or lease. Prices on application.
http://www.mydomainname.co.uk

Name-Shop
Offers domain appraisal and a list of selected domains for sale.
http://www.name-shop.net

Namegiant.com
Categorised and searchable domain listings, prices available on request via telephone, fax and email.
http://www.namegiant.com

Nominet
Official registry for .uk domain names.
http://www.nominet.net

SEDO
European domain name broker. Searchable lists of domain names and domain appraisals.
http://www.sedo.co.uk

TheDomainmart.com
UK based domain listing, categorised by type, asks for offers on listed domain names.
http://www.thedomainmart.com

Url Baron Ltd
Offers a listing of domain names for sale, categorised by top level domain. Also offers listings of design services.
http://www.urlbaron.com