And unfortunately, of that £23bn, something massive percentage will be government "bureaucracy" for want of a better word. If nuclear power were properly commercialised it would be cheaper. The only analogy I can think of is cost of launches for SpaceX vs NASA or ESA. SpaceX had to be efficient and make a profit, they innovated, and now are the cheapest launches available by a huge margin. Governments are always interested in nuclear for "security" reasons.

The article indeed mentions modular commercial reactors.