If your domain's registered at 123-reg.co.uk, you can change the nameservers to point to Web Hosting Hub.  This will allow you to keep the domain registered there, but host with us.  To change your nameservers at 123-reg.co.uk:

1. Click on log in to your control panel at the top of the page
2. Login with your 123-reg.co.uk user name and password
3. Under "Manage Domains" select the domain you want to change and click Modify domain
4. Click on Change Nameservers
5. Scross down the page and under Nameserver 1 and Namesesrver 2 put in ns1.webhostinghub.com and ns2.webhostinghub.com
6. Click Change Nameservers

Once the nameservers are changed, it can take up to 24 hours to take full effect.