Company lists · Data refreshed September 2026

Top 25 Chemical processing plant construction companies based in the United Kingdom

Name: Chemical processing plant construction companies 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 95 companies tracked

RevenueBase identified 95 chemical processing plant construction companies headquartered in the United Kingdom as of September 2026 and tracks 1,165 professional contacts across them, including 262 with verified work emails. London is the largest hub.

This list covers chemical processing plant construction companies 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

95Companies

1,165Contacts tracked

262Verified emails

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The 25 largest chemical processing plant construction companies based in the United Kingdom

Ranked by team size

Top 25 of 95 chemical processing plant construction companies 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 chemical processing plant construction companies: 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	Ledwood Mechanical Engineering LTD	Partial evidence	Pembrokeshire, United KingdomHQ checked Sep 16, 2026	501-1,000	266 contacts →
	Partial evidence “Ledwood is an independent engineering, fabrication and construction company specialising in the delivery of complex projects across the oil, gas, process and energy industries.” Source: RevenueBase Database · checked Sep 16, 2026
2	Zeppelin Systems UK	Strong evidence	Nottingham, United KingdomHQ checked Sep 16, 2026	1,001-5,000	119 contacts →
	Strong evidence “Zeppelin Systems specialises in industrial plants' design, construction, and technological upgrading for storing, conveying, mixing, dosing, and weighing high-quality bulk…” Source: RevenueBase Database · checked Sep 16, 2026
3	K Home International	Partial evidence	Stockton-on-tees, United KingdomHQ checked Sep 16, 2026	51-200	80 contacts →
	Partial evidence “With over 50 years of continued success, K Home International (KHI) is a family-owned, multi-discipline engineering design and construction company, based in Thornaby…” Source: RevenueBase Database · checked Sep 16, 2026
4	JBA Engineering	Partial evidence	Wynyard, United KingdomHQ checked Sep 16, 2026	11-50	63 contacts →
	Partial evidence “JBA are industry-leading consultants, providing flexible engineering and design solutions, procurement, and construction services.” Source: RevenueBase Database · checked Sep 16, 2026
5	Simon Carves	Indirect evidence	Manchester, United KingdomHQ checked Sep 16, 2026	51-200	44 contacts →
	Indirect evidence “Simon Carves Engineering is a full-service Process Engineering Contractor, providing a comprehensive range of services to the Process and Energy industries worldwide.” Source: RevenueBase Database · checked Sep 16, 2026
6	Enerfac Solutions	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	38 contacts →
	Partial evidence “Enerfac Solutions is a global leader in Engineering, Procurement, Construction, and Commissioning (EPCC), delivering innovative, reliable, and technologically advanced services…” Source: RevenueBase Database · checked Sep 16, 2026
7	Flotech Performance Systems	Indirect evidence	Chichester, United KingdomHQ checked Sep 16, 2026	11-50	35 contacts →
	Indirect evidence “Flotech Performance Systems is a manufacturer and turnkey solutions provider to the Petrochemical, Process and Energy sectors.” Source: RevenueBase Database · checked Sep 16, 2026
8	Eesb Engineering Limited	Indirect evidence	Birkenhead, United KingdomHQ checked Sep 16, 2026	11-50	33 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
9	Enisca	Partial evidence	Cookstown, United KingdomHQ checked Sep 16, 2026	51-200	28 contacts →
	Partial evidence “Enisca is a multi-disciplinary design, engineering and construction business operating in the power and environmental sectors delivering innovative, sustainable and quality…” Source: RevenueBase Database · checked Sep 16, 2026
10	HTS Engineering Group LTD	Indirect evidence	Runcorn, United KingdomHQ checked Sep 16, 2026	11-50	20 contacts →
	Indirect evidence “HTS Engineering is a complete multi discipline engineering partner delivering a complete Design, Build & Maintain Engineering Solution that fills the GAP between large and medium…” Source: RevenueBase Database · checked Sep 16, 2026
11	Prodecon	Partial evidence	Nantwich, United KingdomHQ checked Sep 16, 2026	11-50	19 contacts →
	Partial evidence “ProDecon is a leading provider of turnkey chemical cleaning, refinery decontamination and pre-commissioning cleaning services.” Source: RevenueBase Database · checked Sep 16, 2026
12	Jacquet Weston Engineering	Partial evidence	Hungerford, United KingdomHQ checked Sep 16, 2026	11-50	17 contacts →
	Partial evidence “Jacquet Weston Engineering was established in 1973 and is a private limited company, we are market leaders in the design, manufacture, installation and management of process plant…” Source: RevenueBase Database · checked Sep 16, 2026
13	Hari Construction Limited	Indirect evidence	Grays, United KingdomHQ checked Sep 16, 2026	11-50	17 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
14	Jwci LTD	Partial evidence	Uttoxeter, United KingdomHQ checked Sep 16, 2026	11-50	14 contacts →
	Partial evidence “JWCI Ltd Process Engineers - Specialists in the food, dairy and chemical industries.” Source: RevenueBase Database · checked Sep 16, 2026
15	MG Engineering LTD	Partial evidence	Flint, United KingdomHQ checked Sep 16, 2026	11-50	13 contacts →
	Partial evidence “Since its formation in 1992, MG Engineering provides engineering services to the Chemical, Manufacturing, Paper, Food and Energy Industries.” Source: RevenueBase Database · checked Sep 16, 2026
16	NW Total Engineered Solutions	Indirect evidence	Barrow-in-furness, United KingdomHQ checked Sep 16, 2026	51-200	11 contacts →
	Indirect evidence “NW Total Engineered Solutions Ltd.” Source: RevenueBase Database · checked Sep 16, 2026
17	European Spraydry Technologies	Strong evidence	Harlow, United KingdomHQ checked Sep 16, 2026	11-50	9 contacts →
	Strong evidence “European SprayDry Technologies is a UK Company specialising in the design and manufacture of powder production Liquid processing and general processing plants.” Source: RevenueBase Database · checked Sep 16, 2026
18	Salford Engineering Solutions LTD	Partial evidence	Walkden, United KingdomHQ checked Sep 16, 2026	11-50	9 contacts →
	Partial evidence “Salford Engineering Solutions is a firm of structural engineering, process plant, installation & maintenance specialists based in Walkden, Salford.” Source: RevenueBase Database · checked Sep 16, 2026
19	Busa Engineering	Indirect evidence	Pembroke Dock, United KingdomHQ checked Sep 16, 2026	11-50	9 contacts →
	Indirect evidence “Engineering for Power, Refining and Process Industries.” Source: RevenueBase Database · checked Sep 16, 2026
20	Charles Thompson Limited	Partial evidence	Mexborough, United KingdomHQ checked Sep 16, 2026	11-50	9 contacts →
	Partial evidence “Charles Thompson Limited (CTL) is a specialist designer and manufacturer of process plant equipment to industry sectors including oil & gas, petrochemical, pharmaceutical, agro…” Source: RevenueBase Database · checked Sep 16, 2026
21	Puma Engineering & Construction LTD	Indirect evidence	Southampton, United KingdomHQ checked Sep 16, 2026	51-200	8 contacts →
	Indirect evidence “Established in the year our workshops and offices are located in Southampton, Hampshire.” Source: RevenueBase Database · checked Sep 16, 2026
22	Howe Baker	Strong evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	6 contacts →
	Strong evidence “The specialists of Howe-Baker have great experience in all aspects of natural gas processing, crude oil refinery and water treatment plants.” Source: RevenueBase Database · checked Sep 16, 2026
23	Haden Freeman	Partial evidence	Manchester, United KingdomHQ checked Sep 16, 2026	11-50	5 contacts →
	Partial evidence “Established in 1985 as Freeman Process Systems, a specialist process engineering consultancy serving the chemical and pharmaceutical industries, Haden Freeman Ltd has developed…” Source: RevenueBase Database · checked Sep 16, 2026
24	Entegrator Technology	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	4 contacts →
	Partial evidence “Established in 2014, Entegrator Technology is an engineering, procurement, and construction (EPC) company with a strong track record in industrial projects.” Source: RevenueBase Database · checked Sep 16, 2026
25	Iris Project Solutions LTD	Indirect evidence	Peterlee, United KingdomHQ checked Sep 16, 2026	1-10	3 contacts →
	Indirect evidence “IRIS PROJECT SOLUTIONS LTD offers engineering design and build solutions for your project.” 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: chemical processing plant construction companies. 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 chemical processing plant construction companies.
Partial evidence: Its own public description names part of chemical processing plant construction companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name chemical processing plant construction companies. 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 95 chemical processing plant construction companies based in the United Kingdom

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Chemical processing plant construction companies based in the United Kingdom at a glance

As of Sep 16, 2026

22.5%Verified-email coverage

12.3Average contacts per company

11-50Median size (employees)

13.7%Largest-city concentration · London

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 95 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 chemical processing plant construction companies, 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 “chemical processing plant construction companies”. 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 chemical processing plant construction companies), 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 chemical processing plant construction companies, 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, 262 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 chemical processing plant construction companies, 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 chemical processing plant construction companies are there based in the United Kingdom?

RevenueBase identified 95 chemical processing plant construction companies 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?

Ledwood Mechanical Engineering LTD, headquartered in Pembroke Dock, tops this list with the largest team on record.

Which city has the most chemical processing plant construction companies?

London leads with 13 headquartered companies, followed by Manchester (4) and Birmingham (2).

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 262 verified decision-maker contacts tracked across these 95 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.