As far as I am aware you will not be able to block only one site at a network level with the Smarthub. You would need to use parental controls or buy a VDSLModem/router that allows you to specify and blck web sites individually.
It can`t be done on any of the home hubs, but can be done on a third party £35 router. You can add multiple sites, and also restrict Internet access as well.
BT like to keep things simple on the home hub, so they can control it.
Thanks guys. It's a bit disappointing that I can't restrict access to a particular site. I'm very happy with the HH6 otherwise.
BT network based Parental Controls will allow you to add a site that you want blocked, but it will affect all devices connected to your network.
Thanks, I will try this - it looks like it will work after all.
Many thanks, Keith!