IOP:35.2-3:Man of gas;dist of gas fuels through mains;steam/aircon supp:Weight

20 October 2025

We have corrected two errors in the Index of Production time series dataset due to a processing error. The previous version was incorrect because it had:

1. Incorrect Gross Value Added Weights (GVA). These were not updated to be consistent with the Blue Book 2025 GVA weights and still displayed Blue Book 2024 GVA weights. All calculations which require GVA weights are not impacted as latest weights have been used in these calculations. Therefore no estimates are impacted.

2. Incorrect monthly IoP data from 1948 to 1968. These were not rebased to a 2023=100 basis and were still displayed a 2022=100 basis as per the previous monthly publication. Please note periods after 1968 are not impacted and the annual and quarterly data are correct.

We apologise for any inconvenience caused.