Superfast Crymru paid for the rollout of Copper too.
With the Welsh rollout, there was fair amount of BT trickery to 'just' meet Superfast Cymru contractual targets, i.e. upgrading of 0.5mm Copper to 0.9mm Copper lines in places, to avoid some use of FTTP.
Not exactly in the spirit of what taxpayer thought they were paying for i.e. 'Fibre rollout' which instead, at times, amounted to upgrading BT's legacy Copper Network.