UK electricity demand

After a major power-outage in North London this afternoon I went looking at the National Grid website; there is some fantastic realtime data there about the amount of power the UK is consuming and how much juice is transferred between regions.
I nicked these two applets but click the title link and have a truffle around - 41GWatts currently(!)

Here's an update - interesting article from The Independent on 13th April;

How the Supergrid could help keep the lights on about the electrical interconnects between the UK and other countries; apparently a 900-mile 0.8GWatt link is being proposed to Iceland!