Thanks Keith very much appreciated especially with help of link. Just to make things absolutely clear for someone with my vrey limited knowledge.
If I plug that in to a socket behind my tv do I have to connect anything else by cable, e.g to tv or extender to router ?
Thanks for your patience
I am assuming that your home hub is not in the same room as the YouView box, otherwise you would just run an Ethernet cable?
If the home hub is elsewhere, then the main extender unit connects via a shorrt Ethernet cable, to the home hub. This cable may come with the unit.
The other end connects to the Youview box, via a short Ethernet cable.
Bothe ends need to plug into a mains socket, as the extenders use the mains wiring to carry the data.
In this diagram, the TV represents the BT YouView box.
The router is the home hub.