@David-TP Hi David, thanks a lot for responding 😀 yes the three Decos are wirelessly connected together. I'll test out this suggestion of trying to connect to different decos. Also, I'll adjust...

We've a regular Plusnet fibre but due to being over 3 floors the deco mesh system really helps. I've set up 3 decos. We've now got a really strong signal all through the house. To prevent WiFi...