The graph below may take up to 30 seconds to load.
It shows overlapped hot water use for a number of months for a number of systems. The data has yet to be sanitised and totalled, but has been release for interim discussion. Data is also not adjusted yet for BST time, so some times are 1 hour later than they should be (i.e. no good for analysis).
On the graph you can zoom in by dragging mouse to form a region on the graph. The resolution is to 1 second so it is possible to see individual events as they happen and see the coincidence (in blue).