Solar and Wind

In more recent years in New Andrew it seems to me that you have been focusing much more on system stuff like 100% renewables. And the thrust of that work has been to have a mixture of solar and wind to provide the bulk energy. Now I think you're sort of modifying your approach to include a bit of hydrogen for the firming and sometimes some even batteries although you're still cautious on the cost outlook. Our batteries are an essential part of the element. It's probably now probably a time.