Another update. After a long game of ping pong between Vodafone and CityFibre (who were adamant the issue was not on their network side), it transpires there is another Gigafast customer with exactly the same issue as me in the same geographical area. Correlating the data, Vodafone have discovered we are connected to the same line card, so have thrown the fault back to CityFibre for investigation and hopefully replacement or a lift and shift to another card. Hopefully we are on the way to a resolution. A faulty line card would also, I think, explain the weird packet loss symptoms shown on my BQM Graph
for the connection.
Again I can't fault the Vodafone Gigafast tech support team (all been UK based, and some working from home), they have always called back when they said they would, and have kept me informed throughout via text or calling with updates.
CityFibre it seems need to up their game with regards to fault finding and resolution, and information relayed back to their customer (Vodafone). I guess its probably a similar situation sometimes with ISPs trying to get a resolution and information from Openreach.
ZeN Fibre 2 | Huawei HG612 via Fritz!Box 7530 | ECI Cab (on G.INP trial)
vodafone Gigafast 100/100 | THG3000 (currently faulty!)