Twenty years ago the cost estimate of £8bn was examined at the Hinkley Point Inquiry.
It was found that no allowance had been made for the necessary transmission, then estimated at £1bn, nor was there any allowance for interest during the 10 years construction and it was assumed that someone else would pay for the roadway.
No contingency sum was taken into account. Since then the civil engineering work cost index has more than doubled. On current prices £23bn still looks low.
MICHAEL GAMMON (F), email@example.com