It reminds me of that mysterious appearance of furniture in Ringwood, that was discussed a few years back.
That was never solved IIRC, but it got me thinking, probably up the wrong tree.
The ADSL checker says FTTC is available at full speed, but it can't be. From the map attached the proximity of the exchange can be seen, so I hazzard the line is EO.
I looked up roadworks.org, where I saw two entries not far in a southerly direction from the CS site, but attached to another PCP. I'll leave you to view the roadworks entry. At that location there is work to expand FTTC capacity.
I'm wondering, if BTOR could have opted to either utilise the fibre cab where more beneficial, or to cause the CS Reading Room and its neighbours to obtain fibre by the box in the road works.
is that too improbable!?