De-rating factors for battery storage were applied at the 2024 values rather than 2025. Corrected two days after publication; the conclusion was unaffected but the figure moved by 0.4 GW.
Attributed a constraint cost to the B6 boundary that belonged to B7. Corrected on the day; the total was right.
Transcription error in the 2023 column. Corrected after a reader wrote in, six weeks late, which is too slow.