I think this just goes to show how ridiculously expensive Nuclear is to build in the first place, even before the ongoing costs, waste disposal, decommissioning, etc.

The deal took over a decade and not only includes upfront costs but also British bill payers giving a "generous" subsidy to French energy for 35 years.

Providing 7% of the UK's energy needs is far from nothing but it comes at a very high cost. Bringing all the costs in-house might lessen the bill in the long run (if the UK were to be building a lot) but would require a lot of investment in relearning how to build the plants.