[Harry's warning] Site downtime

In order to prepare the first challenge for release this afternoon we will close the site at 3pm. It will open again at 3.30. As I said in my earlier message, please don't all rush to hit it on the dot! The best thing to do is bookmark the page http://www.cipher.maths.soton.ac.uk/Challenge1text.pdf so you can download it as a pdf directly from the site at around 3.35 or 3.40. Hope you enjoy the Challenge!