Skip to content
CARTIS

Yondr London Campus Building 3

Slough, England, United KingdomUnder construction
Evidence
Planned critical IT
40 MW
Updated
Oct 28, 2026

Yondr London Campus Building 3 is a separately tracked building within Yondr’s Wexham Road campus. The three-building program totals just over 100 MW: 30 MW Building 1, 30 MW Building 2 and 40 MW Building 3. Shared-campus permits and infrastructure do not turn the combined total into this building’s capacity. Phase-by-phase energization, tenant utilization, contract pricing and any undisclosed financing remain outside the verified public record.

Capacity

Reported capacity

Design

40 MW

Source

Reported capacity

Planned / design or future potential

40 MW

Source

Operating IT capacity: Not established in published records

A missing figure does not mean zero. Planned, utility and generation figures are not operating IT capacity.

Development

Development, permitting and phased deliveryAnnounced or preconstruction

Yondr London Campus Building 3 is a separately tracked building within Yondr’s Wexham Road campus. The three-building program totals just over 100 MW: 30 MW Building 1, 30 MW Building 2 and 40 MW Building 3. Shared-campus permits and infrastructure do not turn the combined total into this building’s capacity. Phase-by-phase energization, tenant utilization, contract pricing and any undisclosed financing remain outside the verified public record.

Milestones (1)
Building C planning decision recorded

Jul 24, 2024 · Recorded actual event

Completed · Permit approved

Source not linked

Participants

Yondr Group

Developer

Sources by role
Developer (1)

Site & development

Location context

Actual

Yondr Slough Building 3 | Slough | England | GB

Source

Location context

Actual

Yondr Slough Building 3 | Slough | England | GB

Source

Additional project facts

Lifecycle status

Actual

Construction

Source

Capacity basis

Actual

Yondr publishes 40 MW for the third London campus building.

Source

Lifecycle status

Actual

Construction

Source

Capacity basis

Actual

40 MW is a published future facility or full build IT boundary; it is not operating load.

Source

Operator confirmed

Actual

Yondr Group

Source

Facility capacity basis

Actual

40 MW is a published future facility or full build IT boundary; it is not operating load.

Source

Current lifecycle

Actual

Under development

Source

Infrastructure & permits

Technical details (2)
Electric grid

Planned or represented

40 MW

Published IT design boundary; utility service and operating load remain distinct.

Fiber

Planned or represented

Carrier-neutral or resilient fibre connectivity described for the individual facility.

Air authorization · Issued

Yondr London campus Building 3

Environment Agency

Nov 29, 2023

Sources (1)

Public-source research. Plans may change. See Evidence for sources and qualifications.

Related projects (4)
Yondr London Campus Building 1

Operating · Slough, England, United Kingdom

Same locality: Slough · Shared participant: Yondr Group

Compare in a collection
Yondr London Campus Building 2

Partially operational · Slough, England, United Kingdom

Same locality: Slough · Shared participant: Yondr Group

Compare in a collection
CyrusOne LON1 Slough Data Center

Operating · Slough, England, United Kingdom

Same locality: Slough

Compare in a collection
CyrusOne LON3 Slough Data Center

Operating · Slough, England, United Kingdom

Same locality: Slough

Compare in a collection