Details of the group's subsidiary undertakings, joint ventures and associates are set out below. Unless otherwise specified, the registered address for each entity is Haweswater House, Lingley Mere Business Park, Lingley Green Avenue, Great Sankey, Warrington, WA5 3LP, United Kingdom. For further details of joint ventures and associates please see note 12 and 13.

Class of share
capital held
Proportion of
share capital
owned/voting
rights %*
Nature of business
Subsidiary undertakings
Great Britain
Halkyn District Mines Drainage Company LimitedOrdinary99.9Dormant
Lingley Mere Management Company LimitedOrdinary90.6Property management
North West Water International LimitedOrdinary100.0Holding company
North West Water LimitedOrdinary100.0Dormant
United Utilities (Overseas Holdings) LimitedOrdinary100.0Holding company
United Utilities Bioresources LimitedOrdinary100.0Wastewater services
United Utilities Energy LimitedOrdinary100.0Energy generation
United Utilities Healthcare Trustee LimitedOrdinary100.0Corporate trustee
United Utilities International LimitedOrdinary100.0Consulting services and project management
United Utilities North West LimitedOrdinary100.0Holding company
United Utilities Pensions Trustees LimitedOrdinary100.0Corporate trustee
United Utilities PLCOrdinary100.0Holding and management company
United Utilities Property Services LimitedOrdinary100.0Property management
United Utilities Renewable Energy LimitedOrdinary100.0Renewable energy generation
United Utilities Total Solutions LimitedOrdinary100.0Waste treatment
United Utilities Utility Solutions (Industrial) LimitedOrdinary100.0Holding company
United Utilities Water Finance PLCOrdinary100.0Financing company
United Utilities Water LimitedOrdinary100.0Water and wastewater services
UU (ESPS) Pension Trustee LimitedOrdinary100.0Corporate trustee
UU Group LimitedOrdinary100.0Dormant
UU Secretariat LimitedOrdinary100.0Dormant
YCL Transport LimitedOrdinary100.0Non-trading
The Netherlands
United Utilities (Tallinn) BV(1)Ordinary100.0Holding company
Thailand
Manta Management Services Limited(2)Ordinary100.0Management company
Joint ventures
All joint ventures are accounted for using the equity method and are strategic to the group's activities to varying degrees.
Great Britain
Lingley Mere Business Park Development Company LimitedOrdinary50.0Development company
Selectusonline LimitedOrdinary16.7Procurement portal
Water Plus Group Limited(3)Ordinary50.0Holding company
Water Plus Limited(3)Ordinary50.0Water and wastewater retail services
Water Plus Select Limited(3)Ordinary50.0Water and wastewater retail services
Estonia
AS Tallina Vesi(4)Ordinary35.3Water and wastewater services

* With the exception of United Utilities PLC, shares are held by subsidiary undertakings rather than directly by United Utilities Group PLC.

  1. Registered address: Herikerbergweg 88, 1101 CM Amsterdam, the Netherlands.
  2. Registered address: Unit 2201, No. 1. Soi Chan 2, Yak 3 Chan Road, Thung Wat Don Sub District, Sathorn District, Bangkok, Thailand 10120.
  3. Water Plus Limited and Water Plus Select Limited are wholly owned subsidiaries of Water Plus Group Limited. Registered address: Two Smithfield, Leonard Coates Way, Stoke-on-Trent, ST1 4FD, United Kingdom.
  4. Registered address: Ädala 10, Tallinn 10614, Estonia.