Interesting how this BBC report http://www.bbc.com/news/uk-40303300 on the man arrested outside Parliament is very keen to say that terrorism has not been suggested as a motive.
Also note the picture that the BBC choose of the arrested individual shows him from behind and not in close up. There are better photos available, Guido Fawkes has a clear front on photo on his site. Ask yourself why the BBC might choose not to use that photo.
BBC bias whether by commission or omission is still bias.