In reply to Tall Clare:
I remember it in some decent detail, for someone who doesn't keep a diary/journal.
I actually went to London to see some friends, and DIDN'T go on the march. Think I got to London late in the afternoon. Met various mates who'd been on the march and quizzed them as to why, and they all admitted that it just seemed like a nice day out. They didn't seem particularly "committed" to any political view, at least nothing more sophisticated than "er, um, war is bad, mmmkay?"
Then the day after that I gave a mate from a band a lift back to Brighton, bought some guitar effects pedals that her band were selling off, and got my guitar signed the guitarist
I had been supposed to do all this two weeks beforehand (1 Feb 2003) but my car died on the M1. Got towed home by the AA and heard on the radio that Space Shuttle Columbia had blown up on re-entry. I recall being surprised that Five still saw fit to broadcast episode 1 of CSI: Miami that night, given that it featured the team investigating debris from an aircraft explosion in the Everglades.
In general, I was still going through the motions of trying to write up a Ph.D whilst in my first grown-up full time job outside of academia. I never finished that Ph.D.