07/01/2015 BBC London's video.

A vigil has been held tonight in London to remember those who were killed in Paris today in an apparent militant Islamist attack at the offices of satirical French magazine Charlie Hebdo Officiel. Many of those who gathered in Trafalgar Square carried messages and held pens in the air. More information on the attack here: http://www.bbc.co.uk/news/world-europe-30710883