Cannot see or download historic data

Neither Energy Graph or Energy Graph (Legacy) currently allow the display of monthly data, e.g. for June. It was a problem on 1st July, and appeared fixed on Friday 4th, but today (8th) it has revert to not working.

When I could see June’s data, the figures for the Energy Graph and the Energy Graph (Legacy) differed - see separate topic.

Am I alone in finding this?