While an EPP or Auth code is needed for transferring most domains, some TLDs, such as .co.uk have different requirements that need to be taken into consideration in order to transfer successfully.
To initiate the transfer of a .co.uk domain name, you need to change the IPS tag to the following value:
This can be done by contacting your domain registrar - the company that you purchased the domain from. Once your domain's IPS tag is updated, you will be able to initiate the transfer of your domain to Hostinger 😊
You can find out more about EPP code in the following article: What is an EPP code?