Hopefully that should be an easy answer. Thanks to this post from billion_fan, I am confident that if I purchase a 8900AX-2400 to replace my 7800N, BT TV Youview should work: viewtopic.php?f=20&t=13304&p=27042&hilit=youview#p27031
However, the procedure requires the Youview PVR to be connected directly to the router. In my setup, the PVR is connected to a Layer 3 switch which is the only network element connected to the router. Would the procedure still work if I was to put in the LAN configuration the port of the switch instead?
BTW, that was my first post!

Thanks,
Kortex