It's pretty obvious there's a fault now, the downstream SNR margin has risen from 6 to 15 dB due to all the disconnects. Let's hope that the engineer does a DLM reset once he's fixed the fault, otherwise you'll have to book a broadband boost engineer...
I've just checked your second link, this is something I've never come across, the Hub is reporting the downstream rate above what is allowed by Openreach, it's definitely the Hub.
Edited by deleted (Sun 19-Mar-17 15:12:58)