.CO.UK domain does not have an authorization code.
In order to transfer a domain, the owner must contact the current registrar and request the domain TAG to be changed to the following: TAG: ASCIO
Once the TAG is changed, you can submit an application to transfer the domain on our website from here.
Domain transfer is subject to a fee, and detailed information can be found in our price list. The invoice is generated during ordering process. The order will be processed once the invoice has been paid and the amount has been credited to the Zone (our) system. The submitted order and the generated invoice can be viewed under Orders menu in domain management.
If the invoice is paid through our system using a payment link or credit card, the payment will be received within 15 minutes. Payment made by normal bank transfer will be credited to the system on the next business day. When paying by bank transfer, please be sure to include the reference number and the name of the domain and the invoice number in the payment details.