Thanks for replying. I agree the best thing would be to have them connected via Ethernet but unfortunately I’m not in a position to do that currently.
I do actually have an Ethernet going to the dining room. We had an extension a few years back and I got them to run the cable round. As I knew the router’s signal wouldn’t reach that far. I’d previously had a plug in booster which had worked ok but had its own EXT SSID and I wanted it to be the same throughout. Therefore the TP Link is connected and mirrors the router settings and has always given us really good WiFi speeds so I’ve just never changed it, especially as Virgin make it so difficult to get extra pods. However, it’s getting the speeds and signal upstairs which has been the issue. I got the first WiFi pod from Virgin which did help initially, but recently the speeds have been much lower therefore I thought I would try and get a second one and place it in a position below it in the hope it would improve the signal to the upstairs one.