Whilst I can see what you are getting at meaning the street service, I think I'd still class it as 4 ways of provisioning the FTTP service as a whole.
The devil is in the detail, but it was made clear where the point of handover is. AAISP may also state they provision FTTC using TTB or BTw.
However, back to the mention of Zen's Plexus network - I wanted to make sure Chrys' topic was done with before taking it slightly off track - but because it had been mentioned, I just wondered thought's about Zen's usage of Huawei kit in Plexus.
Personally I'm not fussed either way, but I wondered if it has at least crossed other peoples minds about controversy about Huawei not just for 5G.. or the Core... but even the uncertainty around the statement of "No Huawei equipment in the whole of telecoms infrastructure across the whole of the UK" when referring to even Access and the DSLAMs.
Does it not matter because Zen isn't the incumbent? Yet even so they still have a chunk of business type users. Then again it's not like they supply to govt. There are so many but ifs, buts, what ifs and how comes that it's impossible for me to mention them all.