Methodology

Double-count guard

Three checks run across every emission line. Passed checks shown explicitly — silence is not the same as a clean check.

26 lines · 78 checks run · 1 line(s) with flagged checks

What we check

Cross-event

Was this same attendee or activity already counted in another event in the same reporting window?

Cross-scope

Is catering food in Cat 1 (purchased) AND in Cat 5 (waste embodied)? Are AV materials in Cat 1 AND in Scope 2 (electricity)?

Cross-org-allocation

Is this event's footprint already inside the parent organisation's Scope 3 Cat 6 number for the same period?

All lines · all checks

Cat 6 — Business travel · 8 line(s)
UK attendee rail travel (return)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
UK attendee car travel (petrol/diesel average)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
UK attendee coach / bus travel
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Local Tube / Underground access
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
International attendee air travel — short-haul economy
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Speaker travel (mixed rail + short-haul air)
Cross-event · Speaker also attended Pawston Open Day 2026-Q1 — DEDUCTED from this lineCross-scope · Not also counted under attendee international airCross-org · Not also counted at parent-org allocation
Production crew travel to/from venue
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Non-responder travel imputation (138 attendees)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Cat 1 — Purchased goods (catering) · 5 line(s)
Hot lunch service (mixed menu, 460 covers)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Break-time refreshments (tea, coffee, pastries)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Evening drinks reception (wine, beer, canapés)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
On-site food preparation (gas + electric kitchen)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Single-use service ware (cups, plates, cutlery)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Scope 2 — Purchased electricity · 2 line(s)
Venue grid electricity (location-based)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Venue grid electricity (residual-mix variant — disclosure only)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Cat 1 — Purchased goods (materials) · 4 line(s)
Attendee lanyards + badges
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Event signage + banners (branded vinyl)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Printed programmes + handouts
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
AV hire — embodied share (LED wall + sound rig)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Cat 5 — Waste from operations · 4 line(s)
Food waste (post-service)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Mixed recyclables (paper, plastic, glass)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
General waste (residual to landfill / EfW mix)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Paper waste (programmes, handouts disposed)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Scope 1 — Direct combustion · 1 line(s)
Venue heating share for event hours (natural gas)
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Cat 7 — Employee commuting · 2 line(s)
Pawston event-day staff commute to venue
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation
Pawston staff late-night taxis back from venue
Cross-event · No overlap with other event in reporting windowCross-scope · Not also counted under another scope categoryCross-org · Not also counted at parent-org allocation

One real catch

The check above isn't theatre. Speaker travel on this event flagged a cross-event near-miss — one speaker also attended Pawston Open Day in 2026-Q1. The guard deducted the overlapping segment before publication. Click that line for the full deduction note.