| LSB Plumbing and Heating Ltd | 2017 | 31 Dec 2026 (in 80 days) |
| Luke Metcalfe Gas & Plumbing Ltd | 2020 | 30 Jun 2027 (in 261 days) |
| M Cook Pipe Services Limited | 2026 | 28 Oct 2027 (in 381 days) |
| M Dalley Gas Services Ltd | 2012 | 31 Dec 2026 (in 80 days) |
| M F Fireplace and Stoves Ltd | 2025 | 30 Sep 2027 (in 353 days) |
| M Marston Plumbing & Heating Limited | 2005 | 30 Sep 2027 (in 353 days) |
| M.E.C. (Humber) Limited | 2015 | 31 May 2027 (in 231 days) |
| Maj Plumbing and Heating Ltd | 2022 | 30 Apr 2027 (in 200 days) |
| Mark Shann Quality Gas Heating and Plumbing Limited | 2008 | 31 Oct 2026 (in 19 days) |
| Mason Group Mechanical & Electrical Ltd | 2022 | 31 Jan 2028 (in 476 days) |
| Meadows Mechanical Limited | 2023 | 30 Jun 2027 (in 261 days) |
| Mec Contracting Ltd | 2025 | 31 May 2027 (in 231 days) |
| Mec Facilities Management (Yorks) Ltd | 2025 | 31 May 2027 (in 231 days) |
| Mitchell’S Engineering Services Ltd | 2025 | 31 Dec 2027 (in 445 days) |
| MJC Facilities (Yorkshire) Limited | 2016 | 30 Jun 2027 (in 261 days) |
| MJM Plumbing and Heating (Hull) Limited | 2018 | 31 May 2027 (in 231 days) |
| Moduflow Limited | 2006 | 30 Sep 2027 (in 353 days) |
| Nexus Plumbing Solutions Limited | 2026 | 25 Mar 2028 (in 530 days) |
| NGC Solutions Limited | 2025 | 18 May 2027 (in 218 days) |
| Northern Air Conditioning Ltd | 2021 | 31 Jan 2027 (in 111 days) |
| Northern Plumbing & Heating Ltd | 2024 | |
| NW Gas Services Limited | 2021 | 30 Nov 2026 (in 49 days) |
| Opl Plumbing and Heating Ltd | 2021 | 31 Jul 2027 (in 292 days) |
| Paul Carter Gas Services Limited | 2003 | 31 Dec 2027 (in 445 days) |
| Paxdale Plumbing & Heating Limited | 2014 | 31 Mar 2027 (in 170 days) |
| PCG Practice Equipment Services Ltd | 2025 | 29 Jun 2027 (in 260 days) |
| Phoenix Bathroom Solutions Limited | 2012 | 31 Dec 2026 (in 80 days) |
| Phoenix Gas & Plumbing Limited | 2007 | 31 Dec 2026 (in 80 days) |
| Pioneer Plumbing Limited | 2022 | 31 Oct 2026 (in 19 days) |
| Pitch Heating Limited | 2009 | 31 May 2027 (in 231 days) |
| Plastic Shower Specialists Limited | 2005 | 31 Aug 2027 (in 323 days) |
| Plumbing Consultancy Services (Yorkshire) Ltd | 2019 | 31 Mar 2027 (in 170 days) |
| Plumbing Modular Contractors Limited | 2020 | 31 May 2027 (in 231 days) |
| Plumbs Up Ltd | 2019 | 31 Mar 2027 (in 170 days) |
| Premier Heating Hull Ltd | 2024 | 31 Dec 2027 (in 445 days) |
| Prestige Heating & Gas Ltd | 2021 | 30 Nov 2026 (in 49 days) |
| Prime Pipe & Gas Ltd | 2026 | 24 Dec 2027 (in 438 days) |
| Pro Tech Gas & Air Conditioning Ltd | 2021 | 30 Nov 2026 (in 49 days) |
| Pse Pipework & Fabrication Welding Ltd | 2023 | 30 Nov 2027 (in 414 days) |
| Qesta Home Services Limited | 2025 | 22 Nov 2026 (in 41 days) |
| Raymes Limited | 2013 | 31 Dec 2027 (in 445 days) |
| Richardson Bathrooms Limited | 2025 | 26 Nov 2026 (in 45 days) |
| River Plumbing Ltd | 2012 | 30 Apr 2027 (in 200 days) |
| Robert Fletcher Plumbing Ltd | 2018 | 28 Feb 2027 (in 139 days) |
| S Bailey Plumbing and Heating Engineers Ltd | 2012 | 31 Dec 2026 (in 80 days) |
| S&L Plumbing & Heating Yorkshire Limited | 2026 | 5 Feb 2028 (in 481 days) |
| Saltmer Mechanical Services Ltd | 2024 | 31 May 2027 (in 231 days) |
| SCM Plumbing Ltd | 2024 | 30 Nov 2027 (in 414 days) |
| Shepherd Plumbing and Gas Limited | 2025 | 30 Nov 2027 (in 414 days) |
| Speedy Plumbing Ltd | 2022 | 31 Dec 2027 (in 445 days) |