Annotated aerial view of BT Empire Exchange / Stadium House in Cardiff: footprint, watercourse, substation and nearest dwellings, with measured distances.

Pillar sub-scores

A pillar mixes what is endured and what is chosen; a grade is not the average of the pillars.
●●●○ = documentation available
Energy
EnergyC
●○○○

National grade — the same for every site graded in United Kingdom.

1 published indicator only: “Local grid carbon intensity”

Water
WaterB
●●●○

Missing: Basin withdrawal pressure, Cooling technology + announced water volume.

Land & biodiversity
Land & biodiversityB
●●●○

Missing: Ecological corridors (TVB), Site ground footprint, Avoid-reduce-offset (ERC) measures, Designated for urbanisation in a supra-municipal plan, Planning-document compatibility procedure under way.

Local impact
Local impactC
●○○○

1 published indicator only: “Technological hazard / nearby Seveso sites”

Transparency & governance
Transparency & governance–

“Rated B on site; project data insufficient to grade project & process.”

This site is among the 97% of the fleet built on already-artificialized soil. Fleet figures →

This site is in United Kingdom — the country's site index: B (69.6). See the country index →

Tracked indicators

IndicatorValueReadingStateSource
Energy
Local grid carbon intensity How much CO₂ is emitted to produce the electricity the site will consume, based on the regional grid. The lower the value, the better. 123.8 gCO2e/kWh Measured National Grid ESO carbonintensity.org.uk — GB grid carbon intensity, 12-month mean 2025-10-02..2026-10-02 (123.8 gCO2/kWh, n=17534 half-hourly) — accessed 2026-10-02
Grid connection capacity / proximity How easily the site can be connected to the power grid: available capacity and distance to the nearest substation. — — Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. —
Grid congestion / connection queue How congested the local grid is: the more saturated, the more the connection competes with other users. — — Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. —
PUE (announced energy efficiency) The announced energy efficiency: total electricity used versus what actually powers computing. Closer to 1 is better. The lower the value, the better. — — Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. —
Heat-network connectability Whether the site can valorise its waste heat via a district-heating network: distance to the nearest network and presence of a connection obligation (priority development perimeter). Not disclosed — Absent from the file We read the public file and the information is not in it. It counts as a zero in the grade. —
Waste-heat recovery — commitment Operator commitment level to valorise the site's waste heat (delivered / signed contract / study / intention / none). — — Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. —
Water
Local water stress Water tension in the area: in an already water-scarce region, withdrawals weigh more heavily. no measured water stress in the area Measured WRI Aqueduct 4.0 baseline water stress at point — 'Low (<10%)' (bws_cat 0/4) — accessed 2026-10-02
Water body status The ecological health of the affected river or aquifer, per the EU classification (from 'high' to 'bad'). water body in moderate status Measured Natural Resources Wales (WFD Cycle 3) — statut écologique — plus proche masse d'eau DCE 'Taff - conf Rhondda R to Castle Street' (GB109057027270) ≤500 m : 'Moderate' [nation=GB-WLS] — accessed 2026-10-03
Basin withdrawal pressure How intensively water is already withdrawn from the basin: a heavily-tapped basin ill affords a new user. — — Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. —
Cooling technology + announced water volume The cooling technology chosen and the water volume it will consume, as announced by the operator. — — Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. —
Land & biodiversity
Overlap / distance to protected areas How close the project is to protected natural areas (Natura 2000, nature reserves…). protected natural area 1–5 km away Measured Natural England / JNCC — SAC (England) + UK SPA protected-areas overlap by distance ring (post-Brexit national layers, EEA Natura is EU-only) — accessed 2026-10-02
Soil status (artificialized / natural / agricultural) What the land was before: already built (brownfield), natural, or farmland — sealing farmland or nature weighs most. previously developed land Measured Corine Land Cover 2018 (EEA) — CLC code 111 at point (CLC2018 predates Brexit, covers GB; no national zoning in v0) — accessed 2026-10-02
Ecological corridors (TVB) Whether the project severs a wildlife corridor (green-and-blue network). Not disclosed — Absent from the file We read the public file and the information is not in it. It counts as a zero in the grade. —
Site ground footprint The SITE's ground footprint in hectares — the land the project takes up (buildings, roads, parking, substation, retention basins), not the building print alone: the larger, the greater the land impact. The lower the value, the better. — — Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. —
Avoid-reduce-offset (ERC) measures Measures to avoid, reduce or offset harm to soil artificialisation and biodiversity. (Heat recovery moved to E6/E7, Energy pillar.) — — Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. —
Designated for urbanisation in a supra-municipal plan not scored · contextual fact Is the site designated for urbanisation in a planning document above the municipality? A contextual fact, published as such: it neither improves nor worsens the grade. — — Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. —
Planning-document compatibility procedure under way not scored · contextual fact Is a procedure under way to make the planning document compatible with the project? A contextual fact: we follow the instrument, not the intention — the land status only changes the day the procedure completes. — — Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. —
Local impact
Municipality socio-economic profile The host town's social profile. A safeguard: a project must never improve its grade by locating in a vulnerable town. — — Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. —
Absorption capacity (project size vs municipality) The project's size relative to the town: a very large project in a small town disrupts more. The lower the value, the better. Not disclosed — Absent from the file We read the public file and the information is not in it. It counts as a zero in the grade. —
Technological hazard / nearby Seveso sites The presence of hazardous industrial sites (Seveso) nearby, adding risk to the surroundings. a Seveso establishment on record within 5 km Measured HSE COMAH — registre Seveso GB (upper+lower tier, millésime E+W 2023-03 / Écosse 2022-09, précision postcode-secteur ; « aucun » = AS-OF ce millésime) — registre Seveso national qui ÉNUMÈRE (site-de-contrôle A1 validé) : établissement Seveso le plus proche à 2.8 km. Bandes méthodo ≤2km=high / ≤5km=low. — accessed 2026-10-07
Announced jobs The number of permanent jobs announced, relative to project size. More is better. The higher the value, the better. — — Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. —
Announced tax revenue The tax revenue the project would bring to the town, as announced. — — Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. —
Observed level of opposition The scale of observed opposition: appeals, petitions, mobilizations reported by the press. Not disclosed — Absent from the file We read the public file and the information is not in it. It counts as a zero in the grade. —
Elected officials' position (voted facts only) Elected officials' position as expressed by official votes only (council decisions), with no personal judgment. Not disclosed — Absent from the file We read the public file and the information is not in it. It counts as a zero in the grade. —
Transparency & governance
Consultation / consent / governance (procedural proxies) The quality of the democratic process: public inquiry held, environmental authority opinion, appeals, CNDP referral. — — Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. —
Documentation transparency / file availability How genuinely accessible the project's file is to the public: published studies, figures and commitments. — — Not looked for yet We have not looked for this yet. It is dropped from the calculation and does not penalise the site. —

Operator response

The operator can send us a response about this datasheet. When a response is received and publishable, it appears here, clearly attributed and dated.

A factual error? Use “Report an error”, attaching a source or supporting document.

State of the available data

26 indicators tracked · 6 measured · 0 announced (unverified) · 5 absent from the file · 15 not looked for yet.

Grade history

Methodology 0.3.0 scoremydatacenter.org