Data centres / United Kingdom

SDC M40 Campus, Wapseys Wood

AnnouncedUnited Kingdom5 of 13 fields known

Wapseys Wood landfill site, Buckinghamshire, United Kingdom.

Operator

Not stated

Owner

Not stated

Stage

Announced (source, 16 March 2026)

Power

The scheme includes an on-site gas energy centre with maximum generating capacity of roughly 250 to 350MW, per the Planning Inspectorate project page.

Cooling

Air cooling is proposed.

Proposal stage. The 300MW is the applicant's proposed IT load across three buildings of about 100MW each, as recorded in the Secretary of State's direction. The applicant named in the direction is Slough Holdings UK Limited; the end operator is not stated.

What we checked

• The Secretary of State directed on 16 March 2026 that the three-building campus be treated as a nationally significant project needing a development consent order. (source)
• The proposal is for up to three hyperscale buildings with a proposed IT load of up to about 300MW in total. (source)
• The Planning Inspectorate lists the project as at pre-application stage, with the application expected in January 2027. (source)

What we do not know yet

5 of 13 fields in a complete record are filled. Still missing:

• Owner
• Operator
• Grid connection
• PUE
• Water use
• Chips
• Connectivity
• Certifications

Checked on 2 October 2026. Reported and planned figures are shown as such. Not yet reviewed line by line by a second person. If something is wrong or you know more, tell us.

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