Developer Mapeley / FH Trustees Limited and FH Trustees 2 Limited as applicants
In planningStage source 28 Sept 2026
Published capacity72 MW ITPublished claimProposed full-campus IT design capacity stated by the project team. The planning energy material separately describes approximately 110 MW peak facility demand; neither figure is commissioned load, secured grid import or available customer capacity.
Proposed full-campus IT design capacity stated by the project team. The planning energy material separately describes approximately 110 MW peak facility demand; neither figure is commissioned load, secured grid import or available customer capacity.
110 MW facility · Peak facility demand Approximate completed-site peak demand reported from the submitted Energy Strategy, including cooling and electrical plant; not IT load or secured import. Published claim
1.8 MW import · Existing site grid supply Existing supply described for the administration building during the initial fuel-cell phase; not evidence of supply to the proposed data halls. Published claim
60 MVA · Later SSEN connection Applicant Utilities Statement scope reported as secured but dependent on transmission reinforcement and targeted from 2037. It does not cover the stated 110 MW facility peak and is not an achieved energisation. Published claim
49.9 MW unspecified · Proposed on-site fuel-cell plant Utilities Statement plant rating for proposed natural-gas solid-oxide fuel cells. The Energy Strategy separately gives about 42.5 MW initial effective supply; generation plant is not grid import capacity. Published claim
Published capacity70 MW unspecifiedPublished claimPublished B2 development capacity. The reviewed release does not distinguish IT load from facility demand; no import MVA is verified.
Published B2 development capacity. The reviewed release does not distinguish IT load from facility demand; no import MVA is verified.
Published capacity16.8 MW unspecifiedPublished claimSweet Projects' phase-one case-study rating; MW basis is unspecified and not treated as IT power or utility import.
Sweet Projects' phase-one case-study rating; MW basis is unspecified and not treated as IT power or utility import.
Foyle Port Innovation Park, Maydown, Derry·United Kingdom
Developer GreenScale
Under constructionStage source 7 Aug 2025
Published capacity100 MW importPublished claimCampus grid connections reported as secured by GreenScale; not commissioned IT load. Proposed expansion to 300+ MW is separate.
Campus grid connections reported as secured by GreenScale; not commissioned IT load. Proposed expansion to 300+ MW is separate.
Published capacity108 MW ITPublished claimCurrent undated operator LON6 specification; planned capacity, not live or available capacity. The 2025 announcement and architect design still describe 90 MW IT; the change is not reconciled.
Current undated operator LON6 specification; planned capacity, not live or available capacity. The 2025 announcement and architect design still describe 90 MW IT; the change is not reconciled.
90 MW IT · Earlier announced design June 2025 LON6 announcement and architect design; retained alongside the current 108 MW operator claim. Published claim
160 MVA · Published incoming supply Operator-published 132 kV active/active supply design. No utility agreement or transferable import rights independently verified; redundant feeds are not summed. Published claim
Published capacity12.3 MW ITPublished claimCurrent operator Hayes webpage rating. The specification PDF states 12.2 MW IT; the discrepancy is unresolved. Neither figure establishes spare capacity.
Current operator Hayes webpage rating. The specification PDF states 12.2 MW IT; the discrepancy is unresolved. Neither figure establishes spare capacity.
12.2 MW IT · Specification-sheet IT rating LONDON2 PDF rating differs from the current webpage's 12.3 MW IT. Published claim
20 MVA · Published incoming supply Operator specification and September 2013 secured-supply announcement; not an independently inspected utility agreement or available expansion allocation. Published claim
Newport, Cardiff Capital Region, South Wales·United Kingdom
Developer Vantage Data Centers
OperatingStage source 31 Jan 2024
Published capacity148 MW ITPublished claimFull-campus design rating in the operator specification, consistent with January 2026 campus MW disclosure. Not commissioned, spare or transferable import capacity.
Full-campus design rating in the operator specification, consistent with January 2026 campus MW disclosure. Not commissioned, spare or transferable import capacity.
Published capacity10 MW ITPublished claimKLON-02 expandable design/2023 opening headline. Operator described 8.8 MW base expandable to 10 MW; current undated campus page still lists 8.8 MW. Neither is spare capacity or utility import.
KLON-02 expandable design/2023 opening headline. Operator described 8.8 MW base expandable to 10 MW; current undated campus page still lists 8.8 MW. Neither is spare capacity or utility import.
8.8 MW IT · Current campus-page building rating KLON-02 operating rating on undated Harlow page; the 2023 design explanation identifies expansion to 10 MW. Published claim
Published capacity112.5 MW ITPublished claimOperator-published total campus IT load; not a statement of spare or occupied capacity.
Operator-published total campus IT load; not a statement of spare or occupied capacity.
27 MW IT · LONDON7 contractor design rating Equans' LONDON7 design-and-build case study; historical phase-specific rating, not added to campus total. Published claim
32.5 MW IT · LONDON7 current marketed rating Current campus webpage's LONDON7 rating differs from Equans' 27 MW design scope; upgrade history not verified and not added to campus total. Published claim
