topr8 - 10:42 am on Apr 13, 2011 (gmt 0)
.co.uk is a subdomain of uk
ditto: org.uk, gov.uk, etc.etc
however they are sold by nominet, which is the official uk registry.
the name you mentioned is run by a private company in the same way that if i bought:
example.com i could sell/license/rent/lease/whatever names such as