Is this related to new Nokia 10Gbps PON deployment?
Although there is a 10 Gbps Cablelink connecting the ISP / CP backhaul to the OLT/L2S equipment in the serving exchange for FTTP this should not be confused with XGS-PON deployment...
The Nokia (as indeed Adtran and Huawei but not the older ECI) OLT gear is all XGS-PON capable (with the right line cards and optics) - but as John has noted Openreach have definitely not commercially deployed XGS-PON at all.
The
existing GEA-FTTP service description in SIN 506 from Openreach has not materially altered, including downstream and upstream prioritised bandwidths.
Openreach
could upgrade the network at some point in the future - possibly beyond XGS-PON - but for the here and now this has nothing to do with any minimum speed guarantees being raised by BT...