Defnintely not CGI. At first, a dead ringer from Chinese candle lanterns. But then one shoots off into the night. Grade B.
http://www.youtube.com/watch?v=GdO7sfMFd0w&feature=player_embeddedStory Source:
http://www.thisislocallondon.co.uk/news/weird/8488695.VIDEO__Evidence_of_UFOs_in_East_Croydon_/?ref=rss