Supermarket strategy of closing 2 hours early and stocking shelves properly every night seems to have really worked. There was a noticeable change in the mood in the supermarket today. Shelves were all full, (even penne, apparently the king of pasta, was on offer), and everyone seems to be doing a normal food shop. I guess there's nothing more effective at making people panic than the sight of half-empty shelves, and if they ensure they get to see full shelves every morning, there's no reason to stock up.
As for toilet paper, well, I guess certain primal urges can't be suppressed.