I am the one with the placard from
It was a really good march, the turnout was much larger than I expected (500-800) and dwarfed the rival demonstration (150-200). Everyone was very calm in contrast to the 'animal rights' protest which are marked by scuffles with the police. I guess it's the difference between people who have made a rational choice and fanatics who have lost all sense of perspective in pursuit of their ideology.
The Scientific Activist has an excellent post on the demo: http://scientificactivist.blogspot.com/2006/02/oxford-scientists-bite-back-at-animal.html