Company lists · Data refreshed September 2026

Top 25 Geothermal drilling contractors based in the United Kingdom

RevenueBase identified 112 company matches for geothermal drilling contractors associated with the United Kingdom as of September 2026 and tracks 762 professional contacts across them, including 182 with verified work emails. London is the largest hub.

This list covers company matches for geothermal drilling contractors 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 September 16, 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 Sep 16, 2026 How this list was built
112Companies
762Contacts tracked
182Verified emails
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The 25 largest geothermal drilling contractors based in the United Kingdom

Ranked by team size
Top 25 of 112 company matches for geothermal drilling contractors based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 16, 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 matchSudbrooke, United KingdomHQ recorded Sep 16, 202651-20083 contacts →

Exact match

“Star Energy Group plc is a British energy business.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
2Exact matchWotton-under-edge, United KingdomHQ recorded Sep 16, 202611-5052 contacts →

Exact match

“ADP Group are an independent contractor specialising in the supply of drilling and associated services across the UK.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
3Exact matchBury St Edmunds, United KingdomHQ recorded Sep 16, 202651-20030 contacts →

Exact match

“MGS manufactures and supplies specialist quality products for use in ground investigation, water well, and geothermal drilling applications, as well as a variety of railway…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
4Exact matchArundel, United KingdomHQ recorded Sep 16, 202651-20029 contacts →

Exact match

“Dando Drilling International has over 150 years experience of supplying drilling rigs and equipment for the water well, mineral exploration, geotechnical & geothermal sectors.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
5Exact matchRoss-on-wye, United KingdomHQ recorded Sep 16, 2026201-50024 contacts →

Exact match

“Igne is a UK-wide specialist in pre-construction services, delivering integrated solutions across ground investigation, surveys, UXO risk mitigation, geo-environmental services…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
6Exact matchNewton Abbot, United KingdomHQ recorded Sep 16, 202611-5022 contacts →

Exact match

“ADS Drilling are a drilling contractor with over 35 years in the drilling and site investigation industry.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
7Exact matchSeaham, United KingdomHQ recorded Sep 16, 202611-5021 contacts →

Exact match

“Drilcorp was established in 1992 and since then has developed into one of the UK’s top drilling companies.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
8Exact matchWest Calder, United KingdomHQ recorded Sep 16, 202651-20018 contacts →

Exact match

“GBLE is at the forefront of Scotland’s drilling industry and one of the preferred contractors for major house builders, Environmental, Mining, and Geotechnical Consultants, and…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
9Exact matchLatchingdon, United KingdomHQ recorded Sep 16, 202611-5017 contacts →

Exact match

“Welcome to Endeavour Drilling Ltd the Geo Environmental specialists who can provide a nationwide service.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
10Exact matchWestbury, United KingdomHQ recorded Sep 16, 202611-5017 contacts →

Exact match

“Marshall Drilling offer a nationwide service providing a range of drilling services, specialising in geotechnical and geo-environmental rotary drilling.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
11Exact matchKirdford, United KingdomHQ recorded Sep 16, 202651-20014 contacts →

Exact match

“Nicholls Boreholes & Ground Source is an established, industry leading, family-run, specialist drilling company.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
12Exact matchEdinburgh City, United KingdomHQ recorded Sep 16, 202611-5014 contacts →

Exact match

“We are an award-winning geothermal company based in Edinburgh, Scotland and a leading specialist in all aspects of the UK’s geothermal resources.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
13Exact matchAylesbury, United KingdomHQ recorded Sep 16, 202611-5014 contacts →

Exact match

“We specialise in Geothermal Ground Source Boreholes and Water Boreholes up to 300m.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
14Exact matchKilsyth, United KingdomHQ recorded Sep 16, 20261-1010 contacts →

Exact match

“Clyde Ground Investigation Limited are a self-sufficient contractor with our own drilling plant and engineer.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
15Exact matchKirkby-in-ashfield, United KingdomHQ recorded Sep 16, 202611-509 contacts →

Exact match

“Groundsource Drilling & Contracting Limited is a specialised drilling contractor providing a quality, professional, and reliable drilling service to the public, private and…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
16Exact matchBerwick-upon-tweed, United KingdomHQ recorded Sep 16, 202611-509 contacts →

Exact match

“JB Site Investigations Ltd is a drilling contractor company that strives to provide high quality professional drilling and remain highly respected as leaders in this field.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
17Exact matchKempston, United KingdomHQ recorded Sep 16, 202611-508 contacts →

Exact match

“ANTS Group are a leading supplier of Renewables, Civils, Drilling and Environmental services.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
18Exact matchKinsham, United KingdomHQ recorded Sep 16, 202611-508 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
19Exact matchCressing, United KingdomHQ recorded Sep 16, 202611-507 contacts →

Exact match

“Formerly known as Gary Wheeler Drilling, Established in 1987, we are a family run business based in Essex, with over 30 years experience.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
20Exact matchSt Austell, United KingdomHQ recorded Sep 16, 202611-505 contacts →

Exact match

“Aquasource (SW) Ltd are a family run Borehole, Renewables, and Construction business based at St Stephen in Mid-Cornwall.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
21Exact matchLey Hill, United KingdomHQ recorded Sep 16, 202611-505 contacts →

Exact match

“Ground Investigation, Geotechnical Design Advice, Geothermal Energy, Water Abstraction, Expert Opinion, Knowledge and Training – TFGI provide the essential Ground Engineering…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
22Exact matchBordon, United KingdomHQ recorded Sep 16, 202611-504 contacts →

Exact match

“At Onsen Energy, we provide homeowners, developers, sports clubs, schools and the wider energy market with ground source heating systems and drilling services.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
23Exact matchCambridge, United KingdomHQ recorded Sep 16, 20261-104 contacts →

Exact match

“Primeval Energy is a geothermal solutions company, newly established by seasoned oil and gas, geothermal, finance and commercial professionals.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
24Exact matchSheffield, United KingdomHQ recorded Sep 16, 202651-2004 contacts →

Exact match

“Consortium Drilling is a leading onshore deep drilling contractor based in the heart of the UK.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
25Exact matchPewsey, United KingdomHQ recorded Sep 16, 202611-504 contacts →

Exact match

“First established in 1870, Whatley & Co are a leading provider of and one of the oldest names in water engineering services within southern England.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase

Showing 25 of 112 geothermal drilling contractors based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 182 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal drilling contractors based in the United Kingdom at a glance

As of Sep 16, 2026
23.9%Verified-email coverage
6.8Average contacts per company
1-10Median size (employees)
7.1%Largest-city concentration · London
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
56
11-50
45
51-200
7
201-500
1
501-1,000
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 112 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 “geothermal drilling contractors” 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 182 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 September 16, 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 “geothermal drilling contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal drilling contractors are there based in the United Kingdom?

RevenueBase identified 112 company matches for geothermal drilling contractors associated with the United Kingdom as of September 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?

Star Energy Group PLC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most geothermal drilling contractors?

London leads with 8 company records, followed by Wigan (3) and Alloa (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 182 professional contacts with verified work emails tracked across these 112 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 September 16, 2026.

Ready to reach these companies? Verified emails and direct dials for all 112 geothermal drilling contractors based in the United Kingdom. Start with a free account, no credit card.

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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.