Hello
Malcolm,
You can either transfer your domain name to eUKhost at the time of ordering cPanel Linux Gold plan or leave the domain with the current registrar and just point the nameservers of the domain name to our server in order to use it with our hosting. Both these options are trouble free, its only a matter of personal choice whether to keep hosting and domain separate or at one place.
Domain transfer fees is £6.00 for a .com domain which is including VAT. You won't need to pay any additional fees to transfer your domain name to eUKhost. In order to initiate the transfer of your domain name, you will need to provide us the EPP/Authorization code for your domain which you can get from Easyspace.
Please feel free to ask if you have any more questions.