Started last Wednesday where I lost internet completely - this green light flashes, then it stops and the bottom one flashes and it cycles like that.
I checked status in my area and everything was fine, diagnostics said it's likely not connected properly even though it is and the hub hasn't moved or been touched. I've done a pinhole reset, turned it off for a while and turned it back on and nothing has worked. I booked an engineer to come out the following day and then a few hours later it fixed itself and went back to a white light and working fine. Cancelled the engineer appointment as if there's nothing wrong I get charged £25.
Saturday comes around and it starts again, only it lasts from at least 7am to past midnight. The entire day I had no internet, so I once again booked an engineer for the Monday afternoon, I wake up on the Sunday and it's working again - solid white light. This lasted until around 8pm where it turned green and started flashing again - by which time I'd cancelled the appointment with the engineer - so once again I'm stuck without internet.
I work from home and like many, rely a lot on a good, stable internet connection.
I tweeted Virgin here where you can find the video but there's a photo below too (circled are the lights that alternate flashing.