Around 300 people rallied in Caernarfon against plans for a large AI data centre near the Menai Strait, according to Wales Online. The proposal promises jobs, but has prompted questions about the scale of the development and its local impact.
Watch Desk analysis
What happened
Canolfan Ddata Mena is seeking permission to build the facility on the former Ferodo factory site at Griffith’s Crossing, near Caernarfon. Wales Online reports that an outline planning application has been lodged with Cyngor Gwynedd. The development is described in the report as covering an area equivalent to 57 football pitches.
The rally took place on Saturday. More than 22,000 people have signed a petition opposing the scheme, the report says. Developers say it would create 200 permanent jobs and hundreds more during construction. Plaid Cymru MP Liz Saville Roberts, who spoke at the rally, said residents had raised concerns about water use, site clearance and possible contamination, among other environmental and landscape impacts.
Why it matters
This is a local planning dispute with a direct connection to AI infrastructure: the project is proposed as a data centre, part of the expanding physical footprint needed to support computing. The debate is also unusually concrete. Developers point to employment, while opponents are asking whether the expected long-term jobs justify a development of this scale and what it could mean for the surrounding area.
Those competing claims are not the same as measured outcomes. The figures and concerns here are reported by Wales Online, and the planning process will have to test the proposal and its effects in more detail.
Our read
A promise of 200 permanent jobs deserves scrutiny alongside the project’s land, water and environmental demands, not instead of it. The useful question for the planning process is what evidence would let residents weigh those costs and benefits, rather than asking either side to take a headline figure on trust.
What to watch
- How Cyngor Gwynedd assesses the outline planning application.
- What evidence developers provide on water use, site conditions and environmental effects.
- Whether the promised permanent jobs and wider local benefits are set out in more detail.
Discussion spark: What should carry more weight in deciding this proposal: the promised 200 permanent jobs, or evidence about its local environmental and infrastructure costs?
Sources and evidence
- Hundreds rally against 'staggering' AI data centre plan on Welsh coast – Wales Online (12 October 2026, 06:44 UTC)
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