Company lists · Data refreshed September 2026

Top 25 Diesel engine repair services based in the United Kingdom

Name: Diesel engine repair services based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 372 companies tracked

RevenueBase identified 372 diesel engine repair services headquartered in the United Kingdom as of September 2026 and tracks 1,635 professional contacts across them, including 440 with verified work emails. London is the largest hub.

This list covers diesel engine repair services 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 19, 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 19, 2026 86% judged on-target in blind review

372Companies

1,635Contacts tracked

440Verified emails

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The 25 largest diesel engine repair services based in the United Kingdom

Ranked by team size

Top 25 of 372 diesel engine repair services based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to diesel engine repair services: 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	Mitchell Powersystems	Strong evidence	Nottinghamshire, United KingdomHQ checked Sep 19, 2026	51-200	87 contacts →
	Strong evidence “Mitchell Powesystems specialise in the supply, overhaul and repair of industrial & Marine Diesel Engines, Allison Automatic Transmissions, Off-Highway Driveline Products and the…” Source: RevenueBase Database · checked Sep 19, 2026
2	Royston	Strong evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 19, 2026	51-200	68 contacts →
	Strong evidence “Royston are a dynamic and expanding diesel engine supply, service and repair company operating successfully within the marine, offshore, industrial, defence and rail sectors for…” Source: RevenueBase Database · checked Sep 19, 2026
3	Sapphire Vehicle Services LTD	Partial evidence	Appleby Magna, United KingdomHQ checked Sep 19, 2026	201-500	58 contacts →
	Partial evidence “Sapphire Vehicle Services Ltd are experts in Commercial Vehicle Repairs & Maintenance who specialize in offering a "One Stop Shop" solution for our customers.” Source: RevenueBase Database · checked Sep 19, 2026
4	Bartech Marine Engineering	Indirect evidence	Colchester, United KingdomHQ checked Sep 19, 2026	51-200	54 contacts →
	Indirect evidence “Providing Safety through Mechanical Excellence.” Source: RevenueBase Database · checked Sep 19, 2026
5	Merlin Diesel Systems LTD	Partial evidence	Preston, United KingdomHQ checked Sep 19, 2026	51-200	49 contacts →
	Partial evidence “Merlin Diesel Systems Ltd is a multi-agency company totally dedicated to the global supply of spare parts and test equipment for the servicing of diesel fuel injection systems.” Source: RevenueBase Database · checked Sep 19, 2026
6	PB Asher LTD	Partial evidence	Southampton, United KingdomHQ checked Sep 19, 2026	11-50	33 contacts →
	Partial evidence “PB ASHER Ltd specialise in the reconditioning, supply and exchange of Marine, Commercial and Industrial engine components such as Cylinder Heads, Liners, Pistons, Con Rods, Fuel…” Source: RevenueBase Database · checked Sep 19, 2026
7	Aftercare Response	Indirect evidence	Wednesbury, United KingdomHQ checked Sep 19, 2026	201-500	32 contacts →
	Indirect evidence “Aftercare Response is the UK’s leading provider of maintenance and breakdown services in the UK.” Source: RevenueBase Database · checked Sep 19, 2026
8	Fleet-Serv	Indirect evidence	Peterborough, United KingdomHQ checked Sep 19, 2026	51-200	31 contacts →
	Indirect evidence “Fleet-Serv believes in completing maintenance to standards that prevent unnecessary downtime.” Source: RevenueBase Database · checked Sep 19, 2026
9	Stockport Truck Centre Limited	Indirect evidence	Stockport, United KingdomHQ checked Sep 19, 2026	51-200	27 contacts →
	Indirect evidence “Stockport Truck Centre is at the heart of the STC Group and is dedicated to providing its wide ranging customer base with a one stop solution for all their transport & fleet…” Source: RevenueBase Database · checked Sep 19, 2026
10	Marine Turbo Engineering Limited	Partial evidence	Birkenhead, United KingdomHQ checked Sep 19, 2026	11-50	17 contacts →
	Partial evidence “Established in 1970, Marine Turbo Engineering was one of the first independent turbocharger companies to be ISO approved, back in September 1993.” Source: RevenueBase Database · checked Sep 19, 2026
11	Fishlake Commercial Motors LTD	Indirect evidence	Thorne, United KingdomHQ checked Sep 19, 2026	51-200	16 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
12	Alliance Transport Technologies LTD	Indirect evidence	Clowne, United KingdomHQ checked Sep 19, 2026	51-200	14 contacts →
	Indirect evidence “Alliance Transport Technologies Ltd specialises in providing leading aftermarket products and services for the bus, coach and commercial vehicle industries.” Source: RevenueBase Database · checked Sep 19, 2026
13	Lucas Diesel Systems	Partial evidence	Birmingham, United KingdomHQ checked Sep 19, 2026	51-200	13 contacts →
	Partial evidence “Our top quality diesel injection product range includes over 2,500 items of remanufatured products and over diesel components.” Source: RevenueBase Database · checked Sep 19, 2026
14	Auto Services Perth Limited	Indirect evidence	Perth, United KingdomHQ checked Sep 19, 2026	51-200	13 contacts →
	Indirect evidence “Auto Services Perth Ltd based in Perth, Scotland endeavours to provide outstanding levels of service to all our valued customers from its two city locations.” Source: RevenueBase Database · checked Sep 19, 2026
15	TTS Support LTD	Indirect evidence	Scunthorpe, United KingdomHQ checked Sep 19, 2026	11-50	13 contacts →
	Indirect evidence “With our 25 Mobile Service Vehicles we can attend your commercial vehicle wherever it may be in 60-90.” Source: RevenueBase Database · checked Sep 19, 2026
16	Truck Technics Limited	Partial evidence	Leyburn, United KingdomHQ checked Sep 19, 2026	11-50	12 contacts →
	Partial evidence “Truck Technics Ltd is a large Car & Commercial Service and Repair Centre based near Leyburn, North Yorkshire.” Source: RevenueBase Database · checked Sep 19, 2026
17	HW Martin Fleet Maintenance LTD	Indirect evidence	Alfreton, United KingdomHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “Welcome to H W Martin (Fleet Maintenance) Ltd.” Source: RevenueBase Database · checked Sep 19, 2026
18	STM Engineering Limited	Strong evidence	Great Yarmouth, United KingdomHQ checked Sep 19, 2026	11-50	11 contacts →
	Strong evidence “Marine Engineering Company trading since 1985 Specialists in Marine Diesel – Low, Medium and High Speed.” Source: RevenueBase Database · checked Sep 19, 2026
19	Plantexpand LTD	Partial evidence	Wickford, United KingdomHQ checked Sep 19, 2026	11-50	10 contacts →
	Partial evidence “Specialist service providers for the maintenance and repair of fleet vehicles and plant, as well as equipment and plant sales and tailored industry training programs.” Source: RevenueBase Database · checked Sep 19, 2026
20	Anderson Commercials LTD	Indirect evidence	Ellistown, United KingdomHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence “Anderson Commercials Ltd are dedicated to providing a professional service at a competitive price, our portfolio of customers include blue chip companies such as GE/TIP Vehicle…” Source: RevenueBase Database · checked Sep 19, 2026
21	D&d Autos Ashford LTD	Partial evidence	Ashford, United KingdomHQ checked Sep 19, 2026	11-50	10 contacts →
	Partial evidence “D&D Autos is an award-winning, family-owned MOT, servicing and repair business that has built its reputation on providing unbeatable levels of customer care and high quality…” Source: RevenueBase Database · checked Sep 19, 2026
22	Allen Diesels Limited	Indirect evidence	Bedford, United KingdomHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
23	Mackay Marine Services Limited	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 19, 2026	1-10	10 contacts →
	Indirect evidence “Founded in 1988 Aberdeen based Mackay Marine Services are expert marine and boat technicians.” Source: RevenueBase Database · checked Sep 19, 2026
24	GJC Commercials Limited	Indirect evidence	Bristol, United KingdomHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence “GJC COMMERCIALS LIMITED is an automotive company based out of Bristol, United Kingdom.” Source: RevenueBase Database · checked Sep 19, 2026
25	Sleeman & Hawken	Strong evidence	Teignmouth, United KingdomHQ checked Sep 19, 2026	11-50	9 contacts →
	Strong evidence “Sleeman and Hawken have been trading over 50 years with marine and industrial diesel engines plus related products.” Source: RevenueBase Database · checked Sep 19, 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: diesel engine repair services. 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 diesel engine repair services.
Partial evidence: Its own public description names part of diesel engine repair services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name diesel engine repair services. 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 372 diesel engine repair services based in the United Kingdom

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Diesel engine repair services based in the United Kingdom at a glance

As of Sep 19, 2026

26.9%Verified-email coverage

4.4Average contacts per company

1-10Median size (employees)

2.2%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

249

11-50

51-200

201-500

10001+

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 372 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 diesel engine repair services, 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 “diesel engine repair services”. 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 diesel engine repair services), 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 diesel engine repair services, 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, 440 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 19, 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 diesel engine repair services, 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 diesel engine repair services are there based in the United Kingdom?

RevenueBase identified 372 diesel engine repair services 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?

Mitchell Powersystems, headquartered in Sutton-In-Ashfield, tops this list with the largest team on record.

Which city has the most diesel engine repair services?

London leads with 8 headquartered companies, followed by Birmingham (5) and Bristol (5).

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 440 verified decision-maker contacts tracked across these 372 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 19, 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.