■ 2022: First diesel-free construction site, adoption of science-based targets to tackle carbon emission ‘hotspots’ year-on-year as HS2 is built.
■ 2023: Sign-up to World Green Building Council Net Zero Carbon Buildings Commitment.
■ 2025: Science-based carbon targets for strategic suppliers.
■ 2027: 11% reduction in HGV carbon emissions (compared with 2020).