Using the details we have on here, we've been able to get a fault ticket raised to investigate the broadband issue and it's been logged under F009132366. The estimated fix time is 02/07 and thank you all for your patience whilst we work on the fix.
Well, unfortunately the engineer did turn up at 8.20 but the nobody heard the doorbell. Only realised when I checked the cameras later. Could have called any of our listed phone numbers, but....
I'm still of the opinion that the recent issue was nothing to do with the hubs.
Anyway, speeds are consistent and stable at the moment - might not always be the headline speed, but they're ok. Whether it represents good value is another matter. I would happily sacrifice half my download speed for a double the upload, but i'm getting what is advertised.
Regarding what VM thought was the problem initially - to my uneducated eye, the 3.0 power levels look good. What about docsis 3.1 though. Is -7dBmV within spec ?