Abstract fractal particles field. Detailed chaotic fluid motion simulation

Open call for proposals to create innovative pre-Exascale testbeds


ExCALIBUR (Exascale Computing Algorithms and Infrastructures Benefitting UK Research) is a £45.7m Strategic Priorities Fund (SPF) programme led by the Met Office, UKAEA and UKRI that aims to deliver the next generation of high-performance simulation software for the highest-priority fields in UK research. It started in October 2019 and will run until March 2025, redesigning high priority computer codes and algorithms to meet the demands of advancing technology and UK research.

Open call: ExCALIBUR Hardware & Enabling Software testbeds

As part of the ExCALIBUR initiative, UKRI are investing £4.5m over four years to create and evaluate novel pre-Exascale testbeds, in a co-design partnership with HPC vendors and the UK research community. Testbeds can include hardware and/or enabling software such as data subsystems, filesystems, compilers and debuggers. We expect to fund around 4-5 projects each year. Projects will work closely with ExCALIBUR software working groups supported by UKRI, UKAEA and the Met Office. This call for proposals is for the £1m budget allocated for testbeds in 2022-2023.


  • 15th October 2021 – final date to submit proposals
  • Proposals are now peer reviewed and any clarifications sought
  • w/c 1st November 2021 – shortlisted applicants present to the panel
  • w/c 8th November 2021 – outcomes communicated to applicants
  • Principal Investigators for successful proposals will then be invited to submit a Je-S form covering their project – project funds will be disbursed as grant funding from STFC
  • April 2022 – grants are now active and work can begin on projects

Further information

Frequently Asked Questions, details of previously funded testbed projects and a template showing the information required in a proposal are available from the ExCALIBUR website at https://excalibur.ac.uk/hes. If you have any queries or would like to discuss a potential proposal please do get in touch with the ExCALIBUR Hardware & Enabling Software Programme Office via excalibur-hes@jiscmail.ac.uk.

With our warmest regards,

Prof Simon McIntosh-Smith (University of Bristol), Co-Director (Strategy)
Revd Dr Jeremy Yates (University College London), Co-Director (Delivery)
Martin Hamilton (University College London), Programme Coordinator