| Gem Solutions (UK) Ltd | 2010 | 31 Jul 2027 (in 291 days) |
| Generate Solar Ev Ltd | 2023 | 31 Oct 2026 (in 18 days) |
| George James Electrical Ltd | 2015 | 28 Feb 2027 (in 138 days) |
| GH Davis Electrical Limited | 2014 | 31 Dec 2026 (in 79 days) |
| Gobs Electrics Ltd | 2020 | 30 Nov 2026 (in 48 days) |
| Great Oak Electrical Limited | 2023 | 31 Aug 2027 (in 322 days) |
| Green & Sons Electrical Ltd | 2020 | 31 Jan 2027 (in 110 days) |
| Green Street Electrical Ltd | 2023 | 30 Sep 2027 (in 352 days) |
| GSJ Electrical Services Limited | 2007 | 30 Apr 2027 (in 199 days) |
| H F Hartley Electrical Contractors Limited | 2006 | 31 Jan 2027 (in 110 days) |
| H L Wired Innovations Limited | 2026 | 19 Dec 2027 (in 432 days) |
| Handley Electrical Limited | 2022 | 31 Dec 2026 (in 79 days) |
| Harman Electrical Services Ltd | 2026 | 16 Feb 2028 (in 491 days) |
| Harrison’S Electrical Projects (Hep) Ltd | 2026 | 13 Nov 2027 (in 396 days) |
| Haynes Jointing and Electrical Limited | 2025 | 27 Oct 2026 (in 14 days) |
| Heat Light and Power (UK) Limited | 2012 | 31 Dec 2026 (in 79 days) |
| Heating Homes Group Ltd | 1955 | 30 Sep 2027 (in 352 days) |
| Henderson Electrical Projects Limited | 2017 | 28 Dec 2026 (in 76 days) |
| Henry Homes Building and Electrical Contractors Ltd | 2018 | 30 Apr 2027 (in 199 days) |
| HHS Electrical Limited | 2019 | 31 Dec 2026 (in 79 days) |
| Hickling Heating Ltd | 2023 | 31 Dec 2026 (in 79 days) |
| High Specifications Testing Limited | 2001 | 30 Sep 2027 (in 352 days) |
| Hilton Cannon Facilities Maintenance Ltd | 1998 | 31 Jul 2027 (in 291 days) |
| Hive Electrical Limited | 2018 | 31 Dec 2026 (in 79 days) |
| Hodgman Installation Ltd | 2025 | 29 Apr 2027 (in 198 days) |
| Home Electrical Limited | 2005 | 31 Dec 2026 (in 79 days) |
| Hopkins & Henley Electrical Contractors Limited | 2003 | 31 Aug 2027 (in 322 days) |
| Hummingbird's Electrical Ltd | 2022 | 31 Jan 2027 (in 110 days) |
| Hunter Electrical Contractors Ltd | 2013 | 31 Dec 2026 (in 79 days) |
| Hunter Electrical Installs Limited | 2025 | 8 Feb 2027 (in 118 days) |
| HV Power Engineering Ltd | 2024 | 31 Aug 2027 (in 322 days) |
| Hybrid Electrical Contractors Ltd | 2016 | 31 Dec 2027 (in 444 days) |
| Hyperion Electrical Ltd | 2019 | 31 Dec 2026 (in 79 days) |
| I & S Serv Limited | 2025 | 1 Sep 2027 (in 323 days) |
| I P S (Electrical Contractor) Limited | 2007 | 31 Dec 2026 (in 79 days) |
| Iain A Daly Services Ltd | 2026 | 8 Oct 2027 (in 360 days) |
| Icon Electrical Solutions Ltd | 2013 | 30 Sep 2027 (in 352 days) |
| Ignite Gas Plumbing and Electrics Ltd | 2019 | 30 Nov 2027 (in 413 days) |
| Imperium Electrical Projects Limited | 2024 | 31 Dec 2027 (in 444 days) |
| Innovation Electrical & Data Ltd | 2011 | 31 Jan 2027 (in 110 days) |
| Intelligent Electrical Ltd | 2016 | 30 Sep 2027 (in 352 days) |
| Into M&E Solutions Ltd | 2015 | 30 Sep 2027 (in 352 days) |
| Invictus Electrical Installations Services Limited | 2024 | 30 Apr 2027 (in 199 days) |
| J Booth Electrical Limited | 2018 | 31 Jul 2027 (in 291 days) |
| J Coleman Electrical Services Ltd | 2023 | 31 Jul 2027 (in 291 days) |
| J L W Electrical Ltd | 2018 | 31 Dec 2027 (in 444 days) |
| J Wetton Electrical Services Limited | 2007 | 31 Dec 2026 (in 79 days) |
| J&S Electrical & Renewables Ltd | 2026 | 10 Mar 2028 (in 514 days) |
| J. P. Carty Electrical Contractors Limited | 1996 | 31 Dec 2027 (in 444 days) |
| J2 M&E Services Ltd | 2025 | 16 Jul 2027 (in 276 days) |