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MOSL is the market operator for the non-household water retail market in England – at the centre of the world’s largest competitive water market with over 1.2 million customers, processing more than 90,000 transactions each day.


In its role, MOSL is responsible for the day to day smooth running of the market, enabling new companies to enter, customers to switch and settlement to take place. MOSL also runs the central IT system and is the custodian of central market data, providing insight to the market and its participants on ways to improve performance, reduce frictions and deliver benefits for customers and the environment. You can find out more about MOSL on its website.