@RichDons 

Hi, thanks for your feedback.

Except for the main Sky box, did you have any mini box?

Can I have a picture of your network topology about the Deco system?--please also help me mark out which Deco that Sky Q is connected to;

After that, please refer to the following suggestions:

1. Turn off the fast roaming on the Deco APP, and Mesh technology under the Sky Q device settings page on the Deco APP;

2. If connecting the Sky Q via cable to the Deco, would the internet connection get much better?

Thank you very much and wait for your reply.