UK Next National Supercomputer

Also known as NNSS; Next National Supercomputing Service

Operated by EPCC at Advanced Computing Facility, Edinburgh .

Phase 1 seed dataset, compiled by hand. These rows were built from public operator, laboratory and vendor sources. A mechanical second-reader pass has since fetched every cited source: 1092 of 1153 systems have a readable citation that names them, and 40 are genuinely weakly sourced. Every claim carries its source and a confidence tier. Treat anything below verified as a lead, not a citation.

Measured performance

Rmax: -
Rpeak: -
Rmax ÷ Rpeak: -
Cores: -
Power: -
Per watt: - GF/W

Figures are as last publicly reported for the configuration described below, not a live measurement. Where a system was upgraded in place, the post-upgrade configuration is shown and the earlier one appears in the timeline.

What this machine is made of

One row per supplier relationship. “Supplier at build” is the company that shipped the part at the time; where that company has since been acquired, the parent it rolls up to today is shown beside it. That distinction is what makes ticker-level aggregation possible across a thirty-year dataset.

Role	Part	Supplier at build	Quantity	Confidence	Source
Integrator	- EPCC hosts and operates the UKRI-owned system; hardware vendor not yet selected	EPCC	-	Reported	theregister.com

The read

The UK's next national supercomputer, owned by UKRI and hosted by EPCC at the University of Edinburgh, announced in the June 2025 Spending Review with up to 750 million pounds of government investment (about 300 to 330 million pounds for the system itself per the UKRI market notice). Construction of a new wing of the Advanced Computing Facility at Easter Bush began with a turf-cutting in late June 2026. UK government and EPCC materials describe it as about 50 times more powerful than ARCHER2 and at least a billion-billion calculations per second, but The Register notes the revived project no longer requires exascale, so no FLOPS figure is recorded. UKRI planned to publish the hardware tender in February 2026 and no vendor award was found in the sources checked, so no hardware edges are recorded. Service launch is targeted for 2027.

Timeline

2025-06-11 Announced source

Site & facility

Advanced Computing Facility, Edinburgh

Location: Edinburgh, United Kingdom
Cooling: Direct liquid cooling
Commissioned: 1990

archer2.ac.uk

Change history

2026-10-02 Added UK Next National Supercomputer, the UKRI machine under construction at Edinburgh

Source check

We fetched this system's own citations and recorded whether each page actually mentions it. This is a corroboration signal, not a fact check, and it is published so you can see how well the sourcing holds up rather than take it on trust.

Cited source	Result	Found on the page
theregister.com	names system only	-
worldconstructionnetwork.com	names system only	-

Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.