London mayor Boris Johnson has announced the Spring 2011 launch of the Source London electric vehicle program. For a GBP100 (US$159) annual membership fee, participants will have access to over 1,300 public EV charging points located across the city. Once all those stations are up and running, which should be by 2013, London will have twice as many charging points as petrol stations. It's a big step forward in an even larger scheme, which would see a network of Source charging points in cities across the UK.