It is a challenging target
We need to upgrade the national infrastructure; almost everyone agrees with this. Unfortunately, everyone wants to be next to be upgraded (yes me too) but it takes time to get the work done.
Unfortunately, the telecomms networks are in much the same state as the railways were back in the 50s. Too little investment - and in the case of the telecomms, it's more apparent because of the more rapid changes in technology.
BT used to have the staff to do the work, but trimmed back on their workforce a long time ago. They rely quite heavily now on some contractors to do a proportion of the work (many of whom were trained by BT!)
I'm not trying to defend BT; on the contrary, we are in this situation because of their lack of planning. But I can't see that we are going to get the network we need until there is some serious political pressure to make it happen and at the moment, I just don't see that anywhere.