Okay, a ‘horse charge’ is quite a specific term, as a spokesman for the Metropolitan police said yesterday, claiming that “Police horses were involved in the operation, but that did not involve charging the crowd.” A YouTube video has now however emerged, so you can judge for yourself, whether the mounted police had charged at the students or not, and whether this action was entirely necessary (horses make an appearance at 1 min 10 sec):
Here is the background story from The Guardian.
Update: [27 Nov. 10]
The police have now issued another statement, saying “The police horses were trotting,” not charging. It seems that ‘trotting’ was still sufficient to terrify some children, young people and a pregnant woman, and make them flee and break down crying, as the video shows.