if the fod was installed in 2019 you might find the Agg node that the FOD used might be ful;l and therefore you migth have extensively more fibre to get back to aggregation node that has capacity
That's not going to be the issue. The cable they pulled from the splitter back to the aggregation node was as thick as a sausage: I'd guess 96 strands or more. Basically, when they are installing spine cables, they don't mess about with capacity!
Slightly longer version of this story: the first guys had pulled this thick cable all the way through to the chamber outside my property. Then the auditor said this was wrong: it should only have gone to the chamber where the splitter is installed. So they cut it back to there, and pulled a smaller cable through to serve my 4-port CBT. This new cable was about as thin as a TV coax.
So basically there's a ton of fibre to the splitter node, and there's enough space to pull the smaller cables to each of the (newly required) CBTs in the ducts between the footway boxes.
As I understand it, the CFP survey was required for the physical ducting. For historical reasons, this road has a mix of direct-buried and ducted. The surveyor told me that over time, as and when faults needed to be fixed, they'd upgraded to ducts.
This makes sense: the road was built around 1960, but most of the footway box lids say "BT" which places them in 1980's onwards. There are still one or two smaller covers with "GPO" on them.
Still no quote back from the CFP survey though