In order to change the listed owner/registrant for a .co.uk/.org.uk/.me.uk domain name you will need to login to your Nominet (the Internet registry for the .uk domain name extension) account at https://secure.nominet.org.uk/auth/login.html
2. When the details are complete the new registrant will be contacted and have 5 days to accept the transfer. If this does not happen Nominet will refund the charge and the process will have to be started again.
You can find more information on the process at http://www.nominet.org.uk/uk-domain-names/manage-your-domain/transfer