• Royal Mail has cut its carbon emissions by nearly a third since 2021 and aims to be Net-Zero by 2040
• Average carbon emissions per parcel, already the lowest in the industry, fell by 6% in the last year
• Reductions partly driven by ongoing fleet modernisation and energy efficiencies across the estate
Royal Mail has reduced its carbon emissions by 31% since 2021, maintaining its position as the UK’s greenest parcel operator* and making strong progress towards its Net-Zero target.
Data in its latest Sustainability Report, published today, show average emissions per parcel delivered fell to 164gCO2e, down by 6% on last year. Royal Mail’s total market-based emissions were 1,085KtCO2e in 2025–26, a 31% reduction on its 2020–21 base year and a 7% decrease year-on-year.
The reduction has been driven by continued investment in fleet electrification, the increased use of fossil-free biofuel Hydrotreated Vegetable Oil (HVO) in heavy goods vehicles, and energy efficiency improvements across Royal Mail’s estate. (....)