Factor Watch
Know the moment a factor you rely on changes.
DEFRA reissues its factors every year. Grid intensities get restated. The IPCC revises methodologies. Factor Watch emails you when an emission factor or dataset you follow is revised — the old value, the new value, and the source.
'UK electricity'!E25Data version
2026.111 · supersedes 2025UK grid intensity fell sharply as coal left the mix and renewables grew. If your 2025 inventory used the old figure, your Scope 2 total is overstated — here’s what to restate.
What you’ll get
The data you already use — the day it changes
Three kinds of email, and nothing else. No marketing, ever.
Change alerts
When a factor or dataset you follow is revised, superseded or corrected — the old value, the new value, and the exact source cell it came from.
Methodology briefings
Plain-English explainers when the frameworks move — GHG Protocol, PCAF, CSRD/ESRS, CBAM — and what it means for your inventory.
New data & tools
The new datasets, calculators and API endpoints we publish — so the reference you cite stays current.
Never cite a stale factor again.
One confirmation click and you’re set. Free, about monthly, and you can leave in one click any time.