The second article says "The target cost for each station is GBP1.8 billion (USD2.4 billion) by the time five have been built, with further savings possible."
This indicates that cost per station could be significantly higher before 5 of them have been built. It's reasonable to believe that doggedly continuing to build more of them will bring costs down eventually, but if early units have high costs (or worse, if build progress falls behind schedule) then it could be difficult to maintain support for building more of them.
This indicates that cost per station could be significantly higher before 5 of them have been built. It's reasonable to believe that doggedly continuing to build more of them will bring costs down eventually, but if early units have high costs (or worse, if build progress falls behind schedule) then it could be difficult to maintain support for building more of them.