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Article History

Received: 11 February 2026

Accepted: 3 April 2026

First Online: 1 June 2026

Declarations

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: Author Ben Shepherd has worked with ZEPTO and is co-author of the “Sustainability for Particle Accelerators: RUEDI - A Case Study” and the “Sustainability Assessment of Future Accelerators” from the Laboratory Directors Group Sustain- ability Working Group. Author Niko Neufeld is co-author of the “Sustainability Assessment of Future Accelerators” from the Laboratory Directors Group Sustainability Working Group. Author Dwayne Spiteri is funded by the RF2.0 project that has received funding from the European Union’s Horizon Europe research and innovation programme under grant agreement No. 101131850 and from the Swiss State Secretariat for Education Research and Innovation (SERI). DS is a member of the ErUM data-hub sustainability action group and an author on the paper “Shaping the Digital Future of ErUM Research: Sustainability & Ethics”, a research co-ordinator for the SUSFECIT project, and a session chair for environmental sustainability, business continuity and facility improvement for HEPiX 2026. Author Jim Clarke is a member of lab directors group and the European strategy group for the current ESPPU. Author John Thomason is project sponsor and Senior Responsible Owner for the ISIS-II Project. Author Hannah Wakeling is Sustainability Lead for the ISIS-II Project and author of the cited “Updated results of a life cycle assessment of the ISIS-II neutron and muon source”. HW is also co-organiser of the Sustainable HEP conference 2024, 2025 and 2026. HW is co-author of mentioned publications: “Input to European Strategy Update for Particle Physics: Sustainability”, and the “Sustainability Assessment of Future Accelerators” from the Laboratory Directors Group Sustainability Working Group. HW is author of the mentioned “Environmental Sustainability and Particle Accelerators lecture” in the John Adams Institute for Accelerator Science Graduate Accelerator Physics Course.