What happens when the current phone line is off a pole? Mine is and there is no way across our front garden because it is 95% concrete. Also the current master socket is in the loft space, well eaves space, and that's where I want it to remain.
Stuart
As John says they will almost certainly run yours overhead (why dig when you can use existing poles), in fact in Cliffsend you can now see coiled up ropes at the bottom of the poles.
My brother wanted his master socket in the loft, whilst the engineer didn't want to go in the loft he was more than happy for my brother to pull the cable through, and then the engineer stood on the loft ladder and connected it up and fixed it to a close by beam.
You wouldn't really want the ONT in your loft though as it's not a nice place for electronic equipment due to extremes of temperature.
Not ideal no, but it will in all likely hood be perfectly fine. I've had a Edimax Pro WAP1750 up there since October 2014 and an inverter (currently 42c) for our solar panels since December 2015