Exclusive: UK water giants recruit top staff from regulator Ofwat

Demands for an end to the revolving door' as ex-Ofwat directors are hired by key firms

Two-thirds of England's biggest water companies employ key executives who had previously worked at the watchdog tasked with regulating them, the Observer can reveal.

Cathryn Ross, the new interim joint chief executive of Thames Water and a former head of watchdog Ofwat, is one of several ex-employees working for water companies in senior roles such as strategy, regulation and infrastructure.