A proposed rail-testing facility that has consumed £70m in public money without yet breaking ground faces a critical decision from the Welsh government about its future direction and viability.
The Global Centre of Rail Excellence (GCRE) was established five years ago at the former Nant Helen opencast coal mine near Ystradgynlais in Powys, with ambitions to become the UK's first purpose-built high-speed rail testing facility. The project has struggled to attract the private-sector investment it requires, with executives now proposing a data centre partnership as a potential pathway to unlock additional funding for the rail component.
The Welsh government has invested £50m in GCRE since its creation by Labour in 2021, while the previous UK Conservative administration contributed £20m. According to the Welsh Government, an additional £7.4m has been allocated for research and development beyond the headline figures. Despite these commitments, the facility remains at the planning and design stage.
GCRE's leadership has acknowledged that securing private capital has proven far more difficult than anticipated. The scheme originally sought £330m from commercial investors to develop the site, which spans an area roughly equivalent to Gibraltar's size. Two electrified test tracks, each measuring 4.3 miles (7km), would loop around the location near Bannau Brycheiniog national park, also known as the Brecon Beacons.
Why has private funding proved elusive?
The investment market has deemed the venture too risky in current economic circumstances, according to GCRE's chief executive Simon Jones.
This is an unknown proposition that we have got here. There is risk around being able to create the UK's first purpose-built high speed rail testing facility, and that risk is too great for the market to take on its own in current circumstances.Jones identified macro-economic conditions and lingering effects from the pandemic as contributing factors, but emphasised that investor appetite for novel, untested infrastructure projects remains the core obstacle.
GCRE has conducted extensive outreach to potential backers internationally but has not secured commitments.
I can list off a whole load of what would sound like excuses about macro-economic conditions, the long tail of Covid, etcetera, but essentially it comes down to risk appetite from the investment market,Jones explained.
What is the proposed data centre strategy?
Ministers are being asked to approve plans for an energy and data centre at the site, which GCRE believes could attract additional funding while complementing the rail-testing mission. According to a Welsh Government written statement, the proposed energy and data centre partner would help harness the site's renewable energy potential and develop a major data-centre offering alongside the railway infrastructure.
GCRE has extended its search for an Energy and Data Centre Partner into 2026, with registrations for the revised tender open until 10 March 2026. Jones indicated that detailed conversations with an energy and data centre company were underway but declined to identify the potential partner due to commercial confidentiality restrictions.
The executive stated that completing negotiations this year would position GCRE to sign a contract with a data centre operator, creating a foundation upon which the rail-testing project could proceed.
If the government decides this is something that it wants to do, if we are able to execute the contract with the data centre partner, then five years from now we could be in a situation where we see trains running around this site.
What employment and economic benefits are promised?
GCRE has projected that the completed facility could generate more than 1,000 jobs once operational. The scheme would serve the rail industry's need for testing and validation services, a demand that Jones confirmed exists within the sector. However, the company cannot continue indefinitely drawing on public funds without demonstrating clear progress toward either securing private investment or achieving operational status.
How has the project timeline shifted?
The facility was originally scheduled to begin operations in 2025 but has been delayed until 2030. The scheme was inherited by Plaid Cymru when it won the Senedd election in May, placing responsibility for the project's future with a new administration. The Welsh government said GCRE has been
exploring a range of projects to revitalisethe site and that officials are
working with the company to assess next steps, in light of our productivity mission.
Welsh Conservative Member of the Senedd Andrew RT Davies, who visited the site as chairman of the previous Senedd's economy committee, called for urgent clarity.
The government needs to get its act together, make a quick decision. Is it going to continue to back this site for regeneration purposes or is it going to re-purpose it for other reasons?
What happens next?
The Welsh government is aiming to reach a Final Investment Decision on GCRE in 2027, according to a written statement from the Welsh Government. This decision will follow the completion of design work and the outcome of negotiations with potential energy and data centre partners. GCRE intends to finalise talks with its preferred partner during 2026 so that a binding contract can be executed, with the rail project's future contingent on the success of these parallel negotiations.
The convergence of these timelines means that by 2027, the Welsh government will need to determine whether to commit additional public resources to the rail-testing facility, proceed with the data centre component alone, or pursue alternative uses for the former mine site. Jones emphasised that a government decision on the rail project's viability must align with the signing of any data centre contract to ensure coherent strategy and efficient use of public investment.
