Thanks @Alexandre. The satellites are connected via WiFi link (not powerline) so it's likely to be that causing the limit as you say. I saw this post , which seems to explain the issue you are...

@Alexandre. Thanks for the suggestion. I powered down the two satellite Decos. The Main Deco gave me a speed test of c350Mbps, which is the same speed as the main EE router. However, when I powered...

I've recently upgraded my home broadband to 500Mbps but only seem to be able to get a maximum bandwidth of around 180Mbps (download) when connected to the Deco mesh network. When connected directly...