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A secure and sustainable water supply

Water is essential for everything we do - from having a drink, to washing our clothes, and flushing the loo. It’s also essential for a healthy environment and a prosperous economy.

Many people think there’s plenty of water in the UK, but the South East of England is one of its driest regions and London gets less rain than Rome, Dallas and even Sydney. Our water supplies are being stretched further and further as the number of people living in our area increases.

We plan ahead to ensure we can continue to provide a secure and sustainable water supply for our customers and protect the environment.

People watering an allotment with a watering can and spray bottle

On this page you can learn about:

We’re continuing to work with other water companies in the South East to develop a plan for the region. Read more about this work

We’re also exploring a number of potential new strategic solutions including water transfers, water recycling and a new reservoir.

Our current plan - Water Resources Management Plan 2019

Every five years we prepare a Water Resources Management Plan (WRMP) which sets out how we will provide a secure and sustainable water supply for our customers, whilst protecting the environment.

In March 2020 the Secretary of State for the Environment, Food and Rural Affairs approved our plan which covers the 80-year period from 2020 to 2100 and sets out how we plan to manage our water resources efficiently alongside developing new supplies of water. Our plan is available to read and download.

You can also download the feedback received from the public consultations and the further information requested by the Secretary of State for the Environment, Food and Rural Affairs in December 2019.

An update on our performance

We monitor and report on performance against the commitments we made in WRMP19. The annual report for the period from 1 April 2020 to 31 March 2021, and the mid-year update from April to September 2021, are available to download. These reports present information on our performance against the commitments set out in WRMP19, including leakage reduction and development of new water sources, as well as information on the work to develop a multi-sector resilience plan for the south east region.

Proposing new options

If you'd like to suggest a new solution to provide water or a way to manage our current water more effectively, please read the market information and the bid assessment process.

Water Resources Market Information

In line with Ofwat’s Water Resources Market Information guidance, the information below has been provided to enable third parties to begin to identify opportunities and put forward proposals to us to supply water resources, or provide demand management or leakage services.

We've provided information on key market factors plus our water resources position for each of the six water resource zones (WRZ) in our supply area. This information is in industry-standardised spreadsheets, for the dry year annual average (DYAA) and dry year critical period scenario (DYCP), using templates provided by Ofwat.

The information provided should help third parties to identify where to look for opportunities. However, it is really important that you come and talk to us about your proposal, as our network and the way we provide services to our customers is subject to a range of factors that can change how beneficial opportunities may be or how, when and where we might be able to use them. If you are interested in pursuing any commercial opportunities arising from this information, please view our Bid Assessment Framework below for further information.

Our Trading and Procurement Code

The Trading and Procurement Code sets out how we approach water trading, setting out the policies, principles and requirements that will apply when we trade with appointed water companies and other service providers.

Bid Assessment Framework

Encouraging third parties to submit bids for solutions covering water resources, demand management and leakage services that create value for customers is very important to us. These solutions will help us meet our future water needs, as identified in our Water Resources Management Plan, and benefit our current and future customers. Our Bid Assessment Framework (BAF) will provide clarity to third parties on the process that we will apply and how bids will be assessed in line with our key principles of transparency, equal treatment, non-discrimination and proportionality.

We already publish information for third parties, and it is important that the BAF is read in conjunction with our Network Access Code, Water Resources Market Information, Trading and Procurement Code and Water Resources Management Plan. Details of how to access these can be found within the BAF.

To accompany this statement, we have released a Periodic Indicative Notice (or PIN) via the UK Find a Tender service which outlines the process for third parties to engage with us to offer solutions as part of the WRMP24 process.

Third parties looking to offer solutions to Thames Water as part of the WRMP24 process should contact us to register their interest by email.

Suppliers will need to provide the following in their email:

  • Project applying for (Title and Reference Number as stated in section II.1.1 of the PIN – for WRMP24, this is 1484 WRMP24 – BAF).
  • Company name.
  • 2 x Contact names.
  • 2 x Contact phone numbers.
  • 2 x Email addresses.
  • Whether you are proposing a water supply or demand management/leakage services solution.

Third parties may contact Thames Water at the above address at any time to register their interest, however the proposal may at Thames Water’s discretion be considered for inclusion within the WRMP29 process rather than the WRMP24 process, depending on the point in the process at which the proposal is received. Proposals which are clearly beneficial, robust and which are smaller in terms of volume of water delivered (Ml/d) are more likely to be considered for inclusion in our programme sooner in the planning process.

On registering their interest, third parties will be registered on Thames Water’s IASTA SmartSource portal within two weeks and provided access to complete an initial pre-qualification (PQQ1) survey.

Should third parties feel that Thames Water has not followed the BAF during a bid assessment process, they may at any time submit a complaint by emailing a copy of the bid assessment framework complaint form with the subject line “BAF Complaint”. Complaints will be considered in accordance with the complaints process detailed in Section F of the BAF.

Third parties are welcome to share any feedback they have on our BAF process by email using our bid assessment framework feedback form.