I bet if I wandered round the house of commons at 2am several things would happen
1) I would find a load of PCs left on.
2) I would find a load of PCs left on that don't even have powersave enabled for the monitor, so the wobbly windows logo will be bouncing about on view all night
3) I would be shot.
Maybe our beloved leaders should insist that all future desktop machines they buy are atom based. I have an Acer Revo, which is wonderful, and sips at the electricity. Reviews complain about the 1.6Ghz atom being slow, but with a reasonable OS (i.e. not Vista, or probably W7) it's a perfectly usable desktop system. Come on, we were all perfectly happy to use sub gigahertz machines for word/excel only a few years ago.
Sure it's crap at playing the latest FPS, and it's movie playback is just passable. You wouldn't want to start editing your 12 megapixel Nikon raw files in photoshop either if you are in a hurry, or laying down some funky beats for your top 10 hit, but none of these things should be of any interest to the commons.
It will play movies from Youtube, so they will still be able to watch Gordon attempting to smile and look genuine.
Oh, and even better, it's cheap! £160 without an OS, and I'm sure HM Govt have already sold their souls to M$, so they'll have a nice volume licence install CD, so loads of money left to clear out the moats and install a plasma screen in the duck house.