Replacement Hub 3.0 internet blocked: 'access denied'

My Hub 3.0 hit the solid red light / overheating problem so I've been sent a replacement Hub 3.0 but when I plug it in and log into the admin page it reports that the internet connection is blocked and shows an "Access Denied" message.  The LED on the front shows a solid white light.  

When I plug my old router back in then everything works fine (apart from the red light).

Does the replacement Hub need to be activated by Virgin before it will be recognised?