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Cathryn is the Strategy and Regulatory Affairs Director at Thames Water since June 2021.

Cathryn was previously Group Regulatory Affairs Director at BT Group, responsible for developing and implementing BT’s regulatory strategy across the group, covering regulation in the UK and beyond.

Prior to that, Cathryn was Chief Executive of Ofwat, the independent economic regulator for the water and waste water sector in England and Wales. She was responsible for ensuring that Ofwat held a £120 billion industry to account in delivering against the expectations of customers, wider society and the environment. She successfully saw through the delivery of a new strategy for Ofwat, focussed on a vision for the sector of trust and confidence in water and waste water services, and transformed the regulator in order to deliver this.

Cathryn is an experienced regulatory and competition economist and has worked across a number of different sectors advising on economic, regulatory and competition issues. Previously, Cathryn was Executive Director of Markets and Economics at the Office of Rail Regulation (now Office of Rail and Road). She was Executive Director of Markets and Economics at Ofwat between 2008 and 2011. She also served with the Competition Commission (now Competition and Markets Authority), and worked in economic consultancy.

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