Company lists · Data refreshed November 2026

Top 25 Mission critical facilities operators based in the United Kingdom

RevenueBase identified 97 company matches for mission critical facilities operators associated with the United Kingdom as of November 2026 and tracks 1,995 professional contacts across them, including 336 with verified work emails. London is the largest hub.

This list covers company matches for mission critical facilities operators associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
97Companies
1,995Contacts tracked
336Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest mission critical facilities operators based in the United Kingdom

Ranked by team size
Top 25 of 97 company matches for mission critical facilities operators based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchHeanor, United KingdomHQ recorded Nov 6, 202651-200124 contacts →

Exact match

“WB Power Services Ltd (now proudly part of Rehlko) provide critical power services to some of the UK’s most important businesses and organisations, ensuring essential services are…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchGillingham, United KingdomHQ recorded Nov 6, 202651-20064 contacts →

Exact match

“MEMS Power Generation is the UK leader in generator hire, approaching our 50th year of delivering temporary power solutions that businesses can depend on.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchGlasgow, United KingdomHQ recorded Nov 6, 202651-20049 contacts →

Exact match

“Alba Facilities Services have been successfully supporting and delivering solutions to our commercial building and property clients since 2003.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchLeeds, United KingdomHQ recorded Nov 6, 202651-20047 contacts →

Exact match

“At ICH, we believe that every customer deserves to be more than just another number.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchCrawley, United KingdomHQ recorded Nov 6, 202651-20039 contacts →

Exact match

“TDM Group is a specialist provider of data and communication infrastructure solutions for critical facilities across the UK and Middle East.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchLoughborough, United KingdomHQ recorded Nov 6, 202611-5034 contacts →

Exact match

“on365 is a specialist provider of critical physical IT infrastructure and utility services for public sector, SME and corporate clients across the UK and Europe.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchStockton-on-tees, United KingdomHQ recorded Nov 6, 202611-5032 contacts →

Exact match

“JH Mechanical Services is a leading provider of mechanical, electrical and water management services across the North of England.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchSutton Coldfield, United KingdomHQ recorded Nov 6, 202611-5027 contacts →

Exact match

“Workspace Technology Ltd provide expertly engineered Mission Critical Infrastructure, Rack Colocation Hosting and Maintenance & Support Services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchBerkshire, United KingdomHQ recorded Nov 6, 202651-20024 contacts →

Exact match

“Haz Mission Critical provides professional Mission Critical support to clients around the world.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchScunthorpe, United KingdomHQ recorded Nov 6, 202611-5022 contacts →

Exact match

“Protecting the Heartbeat of British Business'' We create, maintain and manage controlled live environments vital for the operation of thousands of servers at the heart of the UK…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchSheffield, United KingdomHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“The Kirby Group are an integrated facility solutions provider offering services including; security, fire, IT+ communications, electrical, lighting, HVAC Heating, Ventilation &…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchDartford, United KingdomHQ recorded Nov 6, 202611-5017 contacts →

Exact match

“Covering all aspects of HVAC, facilities management and electrical installation.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchWitham, United KingdomHQ recorded Nov 6, 202611-5016 contacts →

Exact match

“EDP Europe specialises in the supply of critical infrastructure solutions for the data centre environment.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchGloucester, United KingdomHQ recorded Nov 6, 202611-5013 contacts →

Exact match

“SmartDCS is a UK-based critical infrastructure specialist delivering end-to-end solutions across data centres, connectivity, electrical systems and renewable energy environments.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchEynsham, United KingdomHQ recorded Nov 6, 202611-5012 contacts →

Exact match

“Established in 1981, McAlpine Grant Ilco Ltd (MGi) specialise in providing installation, maintenance and servicing of cooling and heating units to properties throughout the UK.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchAlloa, United KingdomHQ recorded Nov 6, 202611-5012 contacts →

Exact match

“RMD is an independent specialist in integrated power and cooling solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchRochester, United KingdomHQ recorded Nov 6, 202651-20011 contacts →

Exact match

“Since 1979 the CC Cousins family-run business has specialised in providing a comprehensive range of facilities management solutions for customers ranging from small businesses to…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchBrierley Hill, United KingdomHQ recorded Nov 6, 202611-5010 contacts →

Exact match

“BAXCREST LIMITED is a facilities services company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-20010 contacts →

Exact match

“Cilantro Facilities Management's ethos is to proactively manage mechanical and electrical services across every development we work with - residential, commercial, mixed-use, and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchRochester, United KingdomHQ recorded Nov 6, 202611-509 contacts →

Exact match

“At D2 Facilities, we provide a wide range of building maintenance and facilities management services to commercial, industrial, and public sector clients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchEaling, United KingdomHQ recorded Nov 6, 202611-509 contacts →

Exact match

“At Landmark Facilities Management, we create stability in the buildings people rely on every day.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchGillingham, United KingdomHQ recorded Nov 6, 202611-509 contacts →

Exact match

“Welcome to Generator Installations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchLeeds, United KingdomHQ recorded Nov 6, 20261-108 contacts →

Exact match

“Advanced Power Technology is a leading independent supplier of Energy Efficient Critical Power and Cooling Systems to protect server rooms, data centres and other mission critical…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchHalesowen, United KingdomHQ recorded Nov 6, 202651-2007 contacts →

Exact match

“CDC Facilities Management Ltd (CDCfm) was formed as a direct result of 15 years of continued success by its founding company Cleanroom Design & Construction Ltd.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-505 contacts →

Exact match

“Semper Services provides building services, facilities management, engineering, and energy & utility infrastructure solutions across the UK and Europe.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 97 mission critical facilities operators based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 336 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Mission critical facilities operators based in the United Kingdom at a glance

As of Nov 6, 2026
16.8%Verified-email coverage
20.6Average contacts per company
11-50Median size (employees)
15.5%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
34
11-50
38
51-200
13
201-500
2
501-1,000
1
1,001-5,000
1
10001+
1

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 97 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “mission critical facilities operators” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 336 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “mission critical facilities operators”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many mission critical facilities operators are there based in the United Kingdom?

RevenueBase identified 97 company matches for mission critical facilities operators associated with the United Kingdom as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

WB Power Services LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most mission critical facilities operators?

London leads with 15 company records, followed by Alloa (2) and Dartford (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 336 professional contacts with verified work emails tracked across these 97 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 97 mission critical facilities operators based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.