I just rechecked the Openreach checker and noticed that it states:
Our records show the following FTTP network service information for these premises:-Single Dwelling Unit Residential UG Pre built to curtilage No Dig.
I assume that confirms that the engineer just needs to pull the fibre through the route of the existing copper cable?
Why , if the FTTP build was upto the curtilage of you property , is any further excavation in the public highway necessary ?, presumably once the network is at the boundary, all that remains is to provide the means to get the fibre cable from the curtilage to the house wall, and any excavation in your property doesn’t need council notice