Any PSTN and ADSL over the copper would go to the local copper based exchange (Cuckoo Oak in your case).
On the other hand FTTC fibre feed to the local cabinet (and FTTP) come from the GEA Headend (handover) exchange via the nearest aggregation node. This would include G.Fast as it is another GEA service
Edited by Pheasant (Tue 14-Dec-21 12:30:17)