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Cartis diligence evidence schedule

DC01UK South Mimms Data Center Campus

PRJ-0703 · Site · South Mimms, England, United Kingdom

Record last updated Oct 28, 2026

Scope and capacity

DC01UK has planning approval for a major data-center campus near South Mimms, Hertfordshire. Equinix acquired the project, whose economic study describes approximately 250 MW of capacity and 400 MVA of reserved power. Equinix, DC01UK is associated with the development in South Mimms, Hertsmere, England, GB. The disclosed development scope includes planning approved; approximately 250 MW design; 400 MVA reserved power; acquired by Equinix. Power and physical infrastructure include reserved grid power and a multi-building campus design. The official Hertsmere economic study describes about 250 MW of project capacity.

Headline: 250 MW Planned / design

Numbers refer to their stated physical boundaries and are not added together. Source dates, claim dates and record updates have different meanings. Missing dates and locators are not inferred.

Location context · DC01UK site | South Mimms | Hertfordshire | United Kingdom

Actual · DC01UK South Mimms Data Center Campus (Project)

Claim 57952 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Hertsmere Economic Study 2026

    Hertsmere Borough Council · Document date: Jan 1, 2026 · Primary

    Source reference: SRC-3166 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/asset-library/e4-hertsmere-economic-study-2026-final.pdf

Lifecycle status · Permitted

Actual · DC01UK South Mimms Data Center Campus (Project)

Claim 57953 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Hertsmere Economic Study 2026

    Hertsmere Borough Council · Document date: Jan 1, 2026 · Primary

    Source reference: SRC-3166 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/asset-library/e4-hertsmere-economic-study-2026-final.pdf

Reported capacity · 250 MW

Planned / design or future potential · DC01UK South Mimms Data Center Campus (Project)

Claim 57954 · Recorded claim type: Design · Review: Approved · Claim date: Not stated

Headline treatment: Separate claim, not added to the headline

  1. Hertsmere Economic Study 2026

    Hertsmere Borough Council · Document date: Jan 1, 2026 · Primary

    Source reference: SRC-3166 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/asset-library/e4-hertsmere-economic-study-2026-final.pdf

Capacity basis · The official Hertsmere economic study describes about 250 MW of project capacity.

Actual · DC01UK South Mimms Data Center Campus (Project)

Claim 57955 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Hertsmere Economic Study 2026

    Hertsmere Borough Council · Document date: Jan 1, 2026 · Primary

    Source reference: SRC-3166 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/asset-library/e4-hertsmere-economic-study-2026-final.pdf

Location context · DC01UK site | South Mimms | Hertfordshire | United Kingdom

Actual · DC01UK South Mimms Data Center Campus (Project)

Claim 111399 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Hertsmere Economic Study 2026

    Hertsmere Borough Council · Document date: Jan 1, 2026 · Primary

    Source reference: SRC-3166 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/asset-library/e4-hertsmere-economic-study-2026-final.pdf

Lifecycle status · Permitted

Actual · DC01UK South Mimms Data Center Campus (Project)

Claim 111400 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Hertsmere Economic Study 2026

    Hertsmere Borough Council · Document date: Jan 1, 2026 · Primary

    Source reference: SRC-3166 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/asset-library/e4-hertsmere-economic-study-2026-final.pdf

Reported capacity · 250 MW

Planned / design or future potential · DC01UK South Mimms Data Center Campus (Project)

Claim 111401 · Recorded claim type: Design · Review: Approved · Claim date: Not stated

Headline treatment: Selected headline

  1. Hertsmere Economic Study 2026

    Hertsmere Borough Council · Document date: Jan 1, 2026 · Primary

    Source reference: SRC-3166 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/asset-library/e4-hertsmere-economic-study-2026-final.pdf

Capacity basis · The official Hertsmere economic study describes about 250 MW of project capacity.

Actual · DC01UK South Mimms Data Center Campus (Project)

Claim 111402 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Hertsmere Economic Study 2026

    Hertsmere Borough Council · Document date: Jan 1, 2026 · Primary

    Source reference: SRC-3166 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/asset-library/e4-hertsmere-economic-study-2026-final.pdf

Development scale · Planning approved

Actual · DC01UK South Mimms Data Center Campus (Project)

Claim 111419 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Hertsmere Economic Study 2026

    Hertsmere Borough Council · Document date: Jan 1, 2026 · Primary

    Source reference: SRC-3166 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/asset-library/e4-hertsmere-economic-study-2026-final.pdf

  2. South Mimms outline planning approval

    Hertsmere Borough Council · Document date: Jan 24, 2025 · Corroborating

    Source reference: SRC-6245 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/news/data-centre-in-hertsmere-given-outline-permission-by-planning-committee

Development milestone · Approximately 250 MW design

Actual · DC01UK South Mimms Data Center Campus (Project)

Claim 111420 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Hertsmere Economic Study 2026

    Hertsmere Borough Council · Document date: Jan 1, 2026 · Primary

    Source reference: SRC-3166 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/asset-library/e4-hertsmere-economic-study-2026-final.pdf

  2. South Mimms outline planning approval

    Hertsmere Borough Council · Document date: Jan 24, 2025 · Corroborating

    Source reference: SRC-6245 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/news/data-centre-in-hertsmere-given-outline-permission-by-planning-committee

Power arrangement · 400 MVA reserved power

Actual · DC01UK South Mimms Data Center Campus (Project)

Claim 111421 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Hertsmere Economic Study 2026

    Hertsmere Borough Council · Document date: Jan 1, 2026 · Primary

    Source reference: SRC-3166 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/asset-library/e4-hertsmere-economic-study-2026-final.pdf

  2. South Mimms outline planning approval

    Hertsmere Borough Council · Document date: Jan 24, 2025 · Corroborating

    Source reference: SRC-6245 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/news/data-centre-in-hertsmere-given-outline-permission-by-planning-committee

Site configuration · Acquired by Equinix.

Actual · DC01UK South Mimms Data Center Campus (Project)

Claim 111422 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Hertsmere Economic Study 2026

    Hertsmere Borough Council · Document date: Jan 1, 2026 · Primary

    Source reference: SRC-3166 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/asset-library/e4-hertsmere-economic-study-2026-final.pdf

  2. South Mimms outline planning approval

    Hertsmere Borough Council · Document date: Jan 24, 2025 · Corroborating

    Source reference: SRC-6245 · Government record · Recorded authority: Official primary

    Source URL

    https://www.hertsmere.gov.uk/news/data-centre-in-hertsmere-given-outline-permission-by-planning-committee

Counterparties and capital

DC01UK · Developer · CMP-1444

Equinix, Inc. · Owner · CMP-0222

This schedule captures public Cartis research. It is not a title, lien or legal-opinion report. Document page/section locators and claim review timestamps are included only when published; this version has no separate locator or claim-review-time feed.