"However, the BBC understands that the fact Sizewell C is a carbon copy of Hinkley - which has seen work on a second reactor there completed 30% more quickly than the first - is thought to have substantially mitigated that risk."
It sounds like it should be pretty easy to budget for this plant. Plans are allowed to include a 20% "we don't know what this is going to be spent on but something will come up" for surprises.
"However, the BBC understands that the fact Sizewell C is a carbon copy of Hinkley - which has seen work on a second reactor there completed 30% more quickly than the first - is thought to have substantially mitigated that risk."
It sounds like it should be pretty easy to budget for this plant. Plans are allowed to include a 20% "we don't know what this is going to be spent on but something will come up" for surprises.