Investigation into whether Thames Water is contravening the Wholesale Retail Code

Case summary

We are investigating whether the £25,000 credit limit that Thames Water has set for non-primary services is consistent with the requirements of the Wholesale Retail Code.

This issue had previously formed part of our Competition Act 1998 (“CA98”) investigation into Thames Water, but we no longer consider that the CA98 is the most appropriate tool to use to carry out our investigation.

Date opened

26 June 2020

Relevant powers

Sections 66DA and 117F of the Water Industry Act 1991




Under sections 66DA(4) and 117F(4) of the Act, if as a result of our analysis we consider that Thames Water is not complying with the Wholesale Retail Code, we may give it a direction to take specific action to bring itself back into compliance.


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