Is that postcode correct? The BT Wholesale checker doesn't seem to like it.
I was going to try to check how many addresses can get FTTP. I was wondering if the Openreach work you saw was FTTPoD being installed for someone, and yours being a lucky one of the "premises passed", that can get it as a result.
Connections: OnePlus 8 Pro, 4G max 165Mbps down, 24Mbps up on Three Mobile, and B311 4G router, tbb tests normally 35-45Mpbs down, 65Mbps off-peak, 9-24 up.