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| NDS Electrical & Security Limited | 2013 | 31 Dec 2027 (in 444 days) |
| Nu-Lec Electrical Solutions Ltd | 2020 | 30 Jun 2027 (in 260 days) |
| Onsite Compliance Limited | 2019 | 31 Jan 2027 (in 110 days) |
| Owen Electrical Services Limited | 2023 | 30 Apr 2027 (in 199 days) |
| Paul Lodge Electrical Services Limited | 2026 | 3 Nov 2027 (in 386 days) |
| Pennine Power Cable Jointers Limited | 2018 | 31 Oct 2027 (in 383 days) |
| Phil Armitage Rail Ltd | 2014 | 31 Jan 2028 (in 475 days) |
| Planned Maintenance Testing Services Ltd | 2024 | 30 Apr 2028 (in 565 days) |
| PMK Electrical Contractors Ltd | 2009 | 30 Jun 2027 (in 260 days) |
| Powermunkys Ltd | 2015 | 31 Aug 2027 (in 322 days) |
| Premier Electrical Engineers Ltd | 2026 | 22 Feb 2028 (in 497 days) |
| Pro-Logic Electrical Services Ltd | 2022 | 30 Jun 2027 (in 260 days) |
| R2 Electrical Solutions Ltd | 2026 | 27 Dec 2027 (in 440 days) |
| Raw Electrical Group Ltd | 2019 | 31 Dec 2026 (in 79 days) |
| Redbrook Electrical Services Ltd | 2023 | 30 Apr 2027 (in 199 days) |
| Royston Electrical Services Limited | 2015 | 28 Feb 2027 (in 138 days) |
| RS Electrical Services Ltd | 2026 | 24 Apr 2028 (in 559 days) |
| RT Electrical & Premises Support Limited | 2021 | 31 Dec 2026 (in 79 days) |
| S. T. Electrical Services Ltd | 2008 | 31 Dec 2026 (in 79 days) |
| S.E.M.S. Limited | 2001 | 31 Oct 2026 (in 18 days) |
| S.J. Electrical (Yorkshire) Limited | 2019 | 31 Aug 2027 (in 322 days) |
| Select Electrical & Building Services Ltd | 2011 | 28 Feb 2027 (in 138 days) |
| Sigma Services & Solutions Limited | 2009 | 30 Jun 2027 (in 260 days) |
| SM Electrical Yorkshire Ltd | 2020 | 31 Oct 2026 (in 18 days) |
| Smart Trax Electrical Limited | 2018 | 30 May 2027 (in 229 days) |
| Solar Energy Group Ltd | 2022 | 30 Jun 2027 (in 260 days) |
| Spark Electrical (Yorkshire) Limited | 2025 | 31 Jan 2028 (in 475 days) |
| Specialist Lighting SS Limited | 2008 | 25 Dec 2026 (in 73 days) |
| SRL Electrical Solutions Limited | 2022 | 31 Aug 2027 (in 322 days) |
| Standis Group Limited | 2015 | 31 Mar 2028 (in 535 days) |
| Sykes Electrical Limited | 2007 | 28 Feb 2027 (in 138 days) |
| T9 Electrical Ltd | 2025 | 19 Feb 2027 (in 129 days) |
| Tactical Electrical Services Ltd | 2026 | 28 Jan 2028 (in 472 days) |
| The E-Company Group Ltd | 2020 | 31 May 2027 (in 230 days) |
| TL Electrical Contractors Ltd | 2021 | 30 Apr 2027 (in 199 days) |
| Tynebor Ltd | 2024 | 30 Nov 2027 (in 413 days) |
| UK Electrical Testing and Maintenance Ltd | 2020 | 28 May 2027 (in 227 days) |
| W.Owen Electrical Ltd | 2026 | 3 Dec 2027 (in 416 days) |
| WCT Smart Utility Services Limited | 2019 | 31 Mar 2027 (in 169 days) |
| Wise Guard Security Services Ltd | 2023 | 29 Feb 2028 (in 504 days) |
| Woodcock Electrical Limited | 1999 | 31 Jan 2028 (in 475 days) |
| Yorkshire Electric and Plumbing Limited | 2013 | 31 Dec 2026 (in 79 days) |
| Yorkshire Electrical Compliance Ltd | 2026 | 3 Oct 2027 (in 355 days) |
| Yorkshires Green With Energy Limited | 2011 | 31 Dec 2026 (in 79 days) |