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UK data centre pipeline: 5.7 GW planned by 2030, but only 13% is being built
What changed
Science Works says developers plan to add 5.7 GW from 2026 to 2030, about seven times the UK's 2021 to 2025 build rate, on top of about 1.8 GW installed at the end of 2025. In September 2026, 13% of that capacity was under construction, 26% had full permission but had not started, and 42% was being promoted by developers without a disclosed tenant. The think tank calls it a record of developer intent, not a forecast.
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