@Philbert thanks, I actually got to do live chat with tp-link yesterday and yes, I was missing the homeplug. So I've now purchased a new set and everything is fine. I've two extenders now to the one...

Model not as indicated above, it wasn't on the list I have plugged in Wifi AV600 into power beside Vodafone wifi/fibre box. Have pressed the reset button on tp-link AV 600 Pressed the wps button on...