Company lists · Data refreshed September 2026

Top 25 Hydropower engineering firms based in the United Kingdom

Name: Hydropower engineering firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 119 companies tracked

RevenueBase identified 119 hydropower engineering firms headquartered in the United Kingdom as of September 2026 and tracks 972 professional contacts across them, including 407 with verified work emails. London is the largest hub.

This list covers hydropower engineering firms headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

119Companies

972Contacts tracked

407Verified emails

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The 25 largest hydropower engineering firms based in the United Kingdom

Ranked by team size

Top 25 of 119 hydropower engineering firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to hydropower engineering firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Mackley	Indirect evidence	Small Dole, United KingdomHQ checked Sep 16, 2026	51-200	116 contacts →
	Indirect evidence “Mackley provides a comprehensive range of services from conception through construction to project delivery.” Source: RevenueBase Database · checked Sep 16, 2026
2	Gilbert Gilkes And Gordon LTD	Partial evidence	Kendal, United KingdomHQ checked Sep 16, 2026	51-200	104 contacts →
	Partial evidence “Gilkes delivers innovative, single source solutions to the Small Hydropower and High Horsepower Engine markets.” Source: RevenueBase Database · checked Sep 16, 2026
3	Waterco Datrys	Partial evidence	Ruthin, United KingdomHQ checked Sep 16, 2026	11-50	59 contacts →
	Partial evidence “Waterco Datrys is a leading consultancy in water and environmental engineering, formed through the merger of Waterco and Datrys in 2024.” Source: RevenueBase Database · checked Sep 16, 2026
4	Qualter, Hall & CO Limited	Partial evidence	Barnsley, United KingdomHQ checked Sep 16, 2026	51-200	52 contacts →
	Partial evidence “Founded in 1860, Qualter Hall owns a continuous history of engineering excellence in the UK and internationally.” Source: RevenueBase Database · checked Sep 16, 2026
5	Aegaea Limited	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	28 contacts →
	Indirect evidence “Aegaea provides expertise in water, civils and environment including discharge of conditions for outline and full planning.” Source: RevenueBase Database · checked Sep 16, 2026
6	Kgal Consulting Engineers LTD	Partial evidence	Wakefield, United KingdomHQ checked Sep 16, 2026	11-50	24 contacts →
	Partial evidence “KGAL offers a complete structural, mechanical, electrical and hydraulic engineering service through all stages of a project, from conceptual design development to final…” Source: RevenueBase Database · checked Sep 16, 2026
7	Green Highland A Voith Company	Partial evidence	Perth, United KingdomHQ checked Sep 16, 2026	11-50	22 contacts →
	Partial evidence “We are one of the leading developers and operators of hydropower.” Source: RevenueBase Database · checked Sep 16, 2026
8	Hydroplan UK	Partial evidence	Wimborne, United KingdomHQ checked Sep 16, 2026	11-50	19 contacts →
	Partial evidence “Hydroplan is a leading UK hydropower consultancy specialising in the design, construction and project management of small to medium sized hydropower projects in the UK and…” Source: RevenueBase Database · checked Sep 16, 2026
9	Wallace Stone LLP	Partial evidence	Dingwall, United KingdomHQ checked Sep 16, 2026	11-50	18 contacts →
	Partial evidence “Wallace Stone (formerly Wallace Stone & Partners) was established in 1973 and is a member of the Association for Consultancy and Engineering.” Source: RevenueBase Database · checked Sep 16, 2026
10	Industrial And Marine Hydraulics	Partial evidence	Middlesbrough, United KingdomHQ checked Sep 16, 2026	11-50	16 contacts →
	Partial evidence “IMH is a leading hydraulic engineering company headquartered in the UK and operating internationally.” Source: RevenueBase Database · checked Sep 16, 2026
11	Edenvale Young Associates	Partial evidence	Bristol, United KingdomHQ checked Sep 16, 2026	11-50	15 contacts →
	Partial evidence “Edenvale Young is a Civil Engineering and Scientific Consultancy specialising in the fluvial, coastal and maritime environment.” Source: RevenueBase Database · checked Sep 16, 2026
12	WCI Group LTD	Partial evidence	Taunton, United KingdomHQ checked Sep 16, 2026	11-50	14 contacts →
	Partial evidence “WCI Group Ltd is the leading expert in water and wastewater engineering, delivering innovative solutions with over four decades of expertise.” Source: RevenueBase Database · checked Sep 16, 2026
13	Miles Water Engineering LTD	Partial evidence	Great Ashfield, United KingdomHQ checked Sep 16, 2026	11-50	13 contacts →
	Partial evidence “Miles Water Engineering are specialists in design, construction and renovation of water-related projects.” Source: RevenueBase Database · checked Sep 16, 2026
14	Caley Water	Partial evidence	Edinburgh, United KingdomHQ checked Sep 16, 2026	11-50	12 contacts →
	Partial evidence “Caley Water is a water and environmental consultancy that offers a range of specialist hydraulic modelling, data survey management and civil engineering design services.” Source: RevenueBase Database · checked Sep 16, 2026
15	Gondolin Land & Water LTD	Partial evidence	Edinburgh, United KingdomHQ checked Sep 16, 2026	11-50	12 contacts →
	Partial evidence “Gondolin Land & Water Ltd is a growing Environmental and Civil Engineering Consultancy business based in Scotland with coverage throughout England, Scotland and Ireland.” Source: RevenueBase Database · checked Sep 16, 2026
16	Gilkes Energy LTD	Partial evidence	Kendal, United KingdomHQ checked Sep 16, 2026	1-10	12 contacts →
	Partial evidence “Gilkes Energy is the UK’s leading independent hydropower and pumped storage hydro project developer.” Source: RevenueBase Database · checked Sep 16, 2026
17	FPS Environmental LTD	Partial evidence	Nottingham, United KingdomHQ checked Sep 16, 2026	1-10	11 contacts →
	Partial evidence “As part of The FPS Group, FPS Environmental Ltd delivers engineering excellence within the flood, water, and environmental sectors.” Source: RevenueBase Database · checked Sep 16, 2026
18	Chemsol Group	Partial evidence	Conwy, United KingdomHQ checked Sep 16, 2026	11-50	11 contacts →
	Partial evidence “The Chemsol Group design, install and maintain both private & commercial water engineering projects across England and Wales.” Source: RevenueBase Database · checked Sep 16, 2026
19	Richard Allitt Associates LTD	Partial evidence	Staplefield, United KingdomHQ checked Sep 16, 2026	11-50	10 contacts →
	Partial evidence “Richard Allitt Associates is a leading provider of hydraulic engineering and flood risk consultancy for the urban drainage industry.” Source: RevenueBase Database · checked Sep 16, 2026
20	M&c Engineering	Partial evidence	Ipswich, United KingdomHQ checked Sep 16, 2026	11-50	10 contacts →
	Partial evidence “Established in 1985, M&C Engineering has a wealth of knowledge and experience, as well as an ever-expanding team of highly skilled engineers.” Source: RevenueBase Database · checked Sep 16, 2026
21	Glenfield Valves LTD	Indirect evidence	Prestwick, United KingdomHQ checked Sep 16, 2026	11-50	10 contacts →
	Indirect evidence “Glenfield Valves, located in Scotland since 1852, have been designing and manufacturing specialist engineered valves for more than 160 years.” Source: RevenueBase Database · checked Sep 16, 2026
22	Renewables First LTD	Partial evidence	Stroud, United KingdomHQ checked Sep 16, 2026	11-50	9 contacts →
	Partial evidence “UK leader in hydropower consultancy, environmental licensing, detailed design and specification, project management and installation.” Source: RevenueBase Database · checked Sep 16, 2026
23	AJT Engineering Limited	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 16, 2026	51-200	8 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
24	Schema	Indirect evidence	Norwich, United KingdomHQ checked Sep 16, 2026	1-10	8 contacts →
	Indirect evidence “We offer sustainable planning and design for a changing world.” Source: RevenueBase Database · checked Sep 16, 2026
25	Derwent Hydroelectric Power Limited	Partial evidence	Matlock, United KingdomHQ checked Sep 16, 2026	1-10	7 contacts →
	Partial evidence “DERWENT HYDROELECTRIC POWER LIMITED is a specialist hydropower company, involved in all aspects of UK hydro.” Source: RevenueBase Database · checked Sep 16, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: hydropower engineering firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names hydropower engineering firms.
Partial evidence: Its own public description names part of hydropower engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hydropower engineering firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 119 hydropower engineering firms based in the United Kingdom

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Hydropower engineering firms based in the United Kingdom at a glance

As of Sep 16, 2026

41.9%Verified-email coverage

8.2Average contacts per company

1-10Median size (employees)

5.9%Largest-city concentration · London

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

5,001-10,000

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 119 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among hydropower engineering firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “hydropower engineering firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names hydropower engineering firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among hydropower engineering firms, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 407 across the full list. 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.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names hydropower engineering firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many hydropower engineering firms are there based in the United Kingdom?

RevenueBase identified 119 hydropower engineering firms headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Mackley, headquartered in Small Dole, tops this list with the largest team on record.

Which city has the most hydropower engineering firms?

London leads with 7 headquartered companies, followed by Manchester (4) and Aberdeen (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 407 verified decision-maker contacts tracked across these 119 companies.

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.

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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 Smart Search, 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.