There is another guy waiting on this too.
The last time I checked through all the CityFibre information I read they were aiming to offer it by mid-2018.
I've not heard any update since. I guess you'll have to keep your eyes peeled about it and let us know.
It will be interesting to hear of the install process and performance.
Demon => Freeserve => Pipex => Be => Sky => BT Infinity 2