Two years ago, there were “howls of protest” (his words) when incoming Ofwat chairman Jonson Cox set out a vision for the water sector that included companies sharing financial pain and gain with customers, tightening up governance, and reforming regulation. This time round, at the packed Ideas Space in London’s Westminster yesterday afternoon, the audience of chief executives, analysts and policymakers was more friendly, though once again, there were tough messages in store.