# Chemical Treatment Services (Ireland) Limited

## Details

- **Company number:** [NI017799](https://find-and-update.company-information.service.gov.uk/company/NI017799)
- **Status:** Active
- **Type:** Private Limited Company
- **Incorporated:** 14 Sep 1984
- **Registered office:** HARBOUR COURT, CTS HOUSE, 9 HERON ROAD, BELFAST, BT3 9HB
- **Nature of business:** [39000](/sic/39000) Remediation activities and other waste management services
- **Corporate group:** [Mariner Topco Limited](/group/19401) (28 companies)


## Previous names

- Chemical Treatment Services (Ireland) Limited (until 11 Sep 2026)



## Officers

| Name | Role | Appointed | Resigned |
|---|---|---|---|
| FLEMING, Donald | director | 14 Sep 1984 | 29 Aug 2012 |
| VANCE, Suzanne | director | 18 Feb 2013 | 31 Aug 2013 |
| FERGUSSON, Timothy Charles | director | 18 Feb 2013 | 19 Sep 2018 |
| FERGUSON, Patricia D | secretary | 14 Sep 1984 | 14 Sep 2023 |
| FERGUSON, Patricia D | director | 14 Sep 1984 | 14 Sep 2023 |
| HORTON, Paul John | director | 14 Sep 2023 | 13 Jun 2025 |
| BOLTER, Andrew Christopher | director | 13 Jun 2025 | 31 Jul 2025 |
| FERGUSSON, Robert Charles James | director | 1 May 2019 | 20 Dec 2025 |
| FERGUSSON, Stuart Philip | director | 18 Feb 2013 | 30 Jul 2026 |
| HARTLEY, Benjamin Paul | director | 14 Sep 2023 |  |
| HARTLEY, Gavin Michael | director | 14 Sep 2023 |  |
| NICHOLLS, Andrew Paul | director | 14 Sep 2023 |  |
| FERGUSSON, Jamie Robert | director | 18 Feb 2013 |  |



## Control

| Name | Nature of control | Notified | Ceased |
|---|---|---|---|
| Mr Robin Fergusson | ownership-of-shares-25-to-50-percent, voting-rights-25-to-50-percent | 31 Oct 2020 | 14 Sep 2023 |
| Mrs Patricia Fergusson | ownership-of-shares-25-to-50-percent | 6 Apr 2016 | 14 Sep 2023 |
| Hsl Compliance Holdings Limited | ownership-of-shares-75-to-100-percent, voting-rights-75-to-100-percent, right-to-appoint-and-remove-directors | 14 Sep 2023 |  |



## Accounts

| Year ended | Net assets | Cash | Employees |
|---|---|---|---|
| 31 Dec 2024 | £1,255,110 | £801,598 | 27 |
| 31 Dec 2023 | £593,313 | £600,171 | 23 |
| 30 Apr 2023 | £2,247,159 | £840,956 | 28 |
| 30 Apr 2022 | £1,749,978 | £782,839 | 26 |
| 30 Apr 2021 | £1,264,901 | £783,307 | 25 |
| 30 Apr 2020 | £935,166 | £339,911 | 25 |
| 30 Apr 2019 | £827,595 | £294,457 | - |
| 30 Apr 2018 | £900,032 | £484,397 | - |
| 30 Apr 2017 | £636,291 | £236,769 | 18 |
| 30 Apr 2016 | £561,054 | £237,905 | - |
| 30 Apr 2015 | - | - | - |
| 30 Apr 2014 | £468,176 | £230,879 | - |
| 30 Apr 2013 | £305,060 | £91,945 | - |
| 30 Apr 2012 | £631,238 | £467,076 | - |
| 30 Apr 2011 | £581,050 | £381,976 | - |



## Owned by

Chemical Treatment Services (Ireland) Limited → [HSL Compliance Holdings Limited](/company/08313030) → [HSL Compliance Group Limited](/company/11738872) → [Mariner Bidco Limited](/company/16195589) → [Mariner Midco 2 Limited](/company/16195523) → [Mariner Midco 1 Limited](/company/16195465)




## Directors' other companies

- [HARTLEY, Benjamin Paul](/person/5387660) - director at [Urmson Fire Specialists Limited](/company/11438396)
- [HARTLEY, Benjamin Paul](/person/5387660) - director at [Aquatreat Limited](/company/01707062)
- [HARTLEY, Benjamin Paul](/person/5387660) - director at [Albanyoak Limited](/company/01704503)
- [HARTLEY, Benjamin Paul](/person/5387660) - director at [Chemtreat Limited](/company/01692887)
- [HARTLEY, Benjamin Paul](/person/5387660) - director at [R J Urmson Group Limited](/company/12837834)
- [HARTLEY, Gavin Michael](/person/5387649) - director at [Aquatreat Limited](/company/01707062)
- [HARTLEY, Gavin Michael](/person/5387649) - director at [Plexus Innovation Limited](/company/11105009)
- [HARTLEY, Gavin Michael](/person/5387649) - director at [R J Urmson Group Limited](/company/12837834)
- [HARTLEY, Gavin Michael](/person/5387649) - director at [Urmson Fire Specialists Limited](/company/11438396)
- [HARTLEY, Gavin Michael](/person/5387649) - director at [Chemtreat Limited](/company/01692887)