Overall, there has been an increase in carbon emissions (4.4%) from 71,406 tonnes in 22/23, to 73,455 tonnes in 23/24.
The largest individual contributors to the University’s carbon emissions profile, or those that have seen the most significant increases in the last academic year are as follows:
- The consumption of natural gas remains the largest contribution to scope 1 and 2 emissions at 16%
- There has been a 50% increase in emissions related to business and academic travel, notably a 12% increase in flight numbers with a higher proportion of long-haul flights. Overall, these emissions account for 6% of scope 3 and now exceed pre-Covid levels.
Though there has been a reduction in emissions associated with international students travelling to and from campus (reflecting the decrease in international student numbers), the remaining emissions still represent 15% of scope 3 emissions.
- Other manufactured products have increased by 59% since 22/23 due to spend increases on a range of suppliers, notably furniture. Overall, this category is responsible for 2% of scope 3 emissions.
- IT and Comms remained similar and account for approximately 15% of scope 3 emissions.
- Business services have seen a 44% increase since 2023, largely from suppliers such as AECOM, KPMG, and Crunch DMC. 400 additional suppliers have also been added to the system which will have contributed to this overall increase, representing 16% - the same as our natural gas consumption footprint.
When the carbon reduction targets were set in 2019/20 there was a reasonably developed plan for reducing scope 1 and 2 carbon emissions, however the university and sector’s understanding of scope 3 was only just emerging.
As already outlined, there is complexity not just within scope 1 and scope 2 future mixes, but also how expenditure to reduce these emissions will impact on our scope 3 profile. This can be seen already by the business services associated with the solar farm and Net Zero Energy Centre contributing to an overall gain in the scope 3 category.
It is unclear how the scope 3 trend will evolve under the current budgetary pressures; however, it should be noted that since emissions are currently largely proportional to expenditure, any temporary reductions in the latter cannot be relied upon to deliver sustained emission reductions.
The success of the University’s Scope 3 net zero target relies upon engagement, behavioural and cultural changes by staff, suppliers, and to a lesser extent, students. The Procurement and Sustainability teams continue to focus on scope 3 activities within four workstreams:
- Workstream 1: improving visibility of carbon data through the use of a Carbon Dashboard tool and enhanced reporting via the Finance System. The Carbon Dashboard is available to all budget holders and provides an up-to-date, visual snapshot of estimated Scope 3 emissions based on Procurement and Travel activities for their areas.
In 2024/25 we are working to improve the source data, where possible moving from HESCET estimates to more accurate emissions data provided by our suppliers. A number of changes have been made in the Finance System to underpin this and to improve reporting.
- Workstream 2: staff engagement on procurement and travel. We work to raise awareness by publicising the Scope 3 data on associated intranet pages, at staff meetings, and hold training events. We promote resources to assist staff to procure and travel more sustainably, including the Sustainable Business travel Guidance, Responsible Procurement Checklist and Sustainable Procurement Impact Analyses.
- Workstream 3: providing guidance and collaborating with sector colleagues to develop knowledge. Building on a pilot project in 2023, this year the Procurement and Sustainability teams have worked with a number of other Universities to establish the Net Zero Carbon Tool as an HE-wide database of supplier emissions data and carbon reduction plans. Through this collaboration, we have helped to develop an approach to Scope 3 for the sector. We are part of the HEPA (Higher Education Procurement Association) Responsible Procurement Group which exists to share and develop best practice in all areas of Sustainable Procurement.
- Workstream 4: working with our supply chain to understand existing spending impacts. All contracted suppliers are asked to sign up to the Net Zero Carbon Tool to report on their carbon emissions and to share carbon reduction plans. Sustainability forms part of the agenda for all contract review meetings. For selected suppliers, we track more detailed KPIs and carbon reduction plans. An annual Sustainability Questionnaire capturing additional information around carbon emissions, as well as wider sustainability information, is sent to contracted suppliers. In 2025, we plan to extend this to all suppliers.