To use your domain outside VistaPrint you will need to transfer it.
For all "co.uk" domain names the transfer is free.If you would like to use your .co.uk domain that is registered with VistaPrint with Create you will need to tell VistaPrint that you will be moving your domain name away. VistaPrint should then create your own OpenSRS account, moving your domain into this account and Provide you with the login details.
Please get in touch with your Account Manager with these details who will be happy to help you with the next steps.
If you have not done so already, you should also add your domain name to your Create account by following the steps on our guide for existing domain names here.