This reminds me to the attacks in Madrid. Anyway, I really can't say anything new, only that I wasn't so surprised, London seemed the most probable objective for Al Quaeda. Well, I was surprised to see it today, but I am not surprised it happened.
As for the victims, I hope the number keeps low. I really do. It seems like this terrorist attack is less intense than the one in Madrid, and certainly less than New York. So let's just hope for minimmum casualties.