Sorry, I just reread your post, you are saying that you can't have 2 ethernets in the adapter not the router... As I mentioned, in one adapter I have a pc and a ps4, in the other I have a sky box and...

I just bought the same kit, also on Virgin media. When you say you have 2 ethernet cables plugged in, does that include the one to the powerline unit?. I have one to the tp link, and another to a bt...