Initially unveiled in June last year, the original plans for a state-of-the-art, net zero building have been halted in light of the challenges posed by the rising cost of materials and labour.

The project was granted planning permission by Midlothian Council in October.

While the aspiration for a world-class facility remains unchanged, HES said it will now focus on a more immediate solution to address the need to relocate its collections from John Sinclair House before October 2026.

The immediate focus will be to deliver a temporary solution for storage of the HES Archive while considering a longer-term solution that delivers appropriate care, conservation and access to the archive. This approach will allow HES to carefully consider the most effective and sustainable way forward for the project.

“We are committed to the long-term stewardship of the wonderful national resource that is our archive,” said Craig Mearns, interim chief executive of HES. “While we are disappointed to have to step back from the project as originally conceived, our priority at this time is delivering an appropriate interim solution.”

HES said it remains steadfast in its commitment to net zero principles and will continue to explore opportunities to incorporate sustainable design and construction into the revised project. The organisation will also work closely with partners and stakeholders to develop a long-term plan that meets the needs of both the collections and the public.