"How far in advance do you see the prices?"
They are published about 11 am the day before. So I now know that Friday is 12.35p, so I'll holding back charging the car another day...
There are websites with longer range forecasts which are usually a good guide - they work on pretty much the same factors that determine the auction price - renewables, expected demand etc. Here's one, but some are easier/more difficult to follow depending on your understanding! emoncms.org/ukgrid
There is, of course, the Agile tariff which changes half hourly, and in the current timeframe includes quite a few slots where you get paid for using the electricity (generally but not exclusively overnight). Such fun for those of us who can automate stuff dependent on other stuff :-)
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