Sites / CyrusOne LON7 / Honey Monster site (Southall)
CyrusOne LON7 / Honey Monster site (Southall)
CyrusOne (developer Apt, reported) · in planning · London Borough of Ealing
Hyperscale data centre (Sui Generis) with ancillary offices, affordable workspace / training centre, substation, access, parking and landscaping on the vacant former Honey Monster / Quaker Oats food factory, Bridge Road, Southall UB2 4AE (about 6.8 ha; factory demolished 2022; scheme about 52,000 m²). Application 253874FUL was validated 3 Oct 2025; Ealing planning committee resolved to grant on 15 July 2026, subject to a s106 delivering about £17.8m in contributions. The council portal still shows the application as 'Pending Consideration' (no decision notice issued), so it is mapped as in_planning against the live Ealing Public Access page; operator has not disclosed a clean MW figure.
Stated size
Not disclosed
No megawatt figure in materials reviewed
Operators often omit a megawatt figure. Map circles then use site area instead. Stated size is not electricity use.
Site area
17 acres
ex-industrial / brownfield Planning
What was here: Honey Monster / Quaker Oats food factory (closed 2016, demolished 2022)
Water
Not disclosed
No annual water figure in materials reviewed
Equivalences
No operator on this map discloses expected load factor (the share of peak power used on average), so yearly electricity figures are shown as a range, not as a known total.
- Water: Water use: not disclosed
- Site area: 9.5 football pitches
Claims on record
None recorded yet.
Disclosure checklist
- Stated size (MW): not disclosed
- Water: not disclosed
- Power usage effectiveness (PUE): not disclosed
- Energy source claim: none on record
- Load factor: not disclosed
Plain checklist, no aggregate score.
Right of reply
Right of reply: open; no response received. Email marco@prismaticlabs.ai. Subject is prefilled. Or see methodology.
Timeline
- 2025-10-03: Application 253874FUL validated (Ealing)
- 2026-07-15: Ealing planning committee resolves to grant (253874FUL), subject to s106 (~£17.8m)
Controversies / contested procedure
Objectors and Foxglove raised London grid capacity and power-demand concerns for a hyperscale campus of this scale
Source · campaign source
Sources
- Ealing Public Access: application 253874FUL (live application page)
- Ealing committee report (253874FUL, 15 July 2026)
- DCD: Honey Monster factory site to host CyrusOne data center
- Architects' Journal: Apt's hyperscale Southall data centre approved
Planning application 253874FUL: live portal
Map point: longitude -0.3709, latitude 51.5034. Last reviewed 2026-08-07.