The boss of Ofwat, the regulator of the UK's water services, stepped down today to pursue a senior position in the private sector.
Cathryn Ross, who took the helm of the watchdog in 2013, will take an unspecified role unconnected with the water industry.
The process for recruiting a successor is now underway.
Ofwat said Ross successfully led the regulator through a significant period of change, including the 2014 price review and the opening of the new business retail market.
“Cathryn has been a transformational leader for Ofwat and the sector. As chief executive she has created a dynamic and leading-edge regulator, effective in driving change across the water sector and putting customers first," said Ofwat chairman Jonson Cox.
After four fantastic years, I know I will be leaving Ofwat in good shape. Our regulatory approach is now well established and we have a strong team in place.
We are ready for a demanding price review, which will deliver more of what matters for customers. I look forward to finalising the PR19 [price review 2019] methodology before I leave.