I just wrote up this article about plans in London for massive EV adoption: Comparing London's ambitious 100,000 electric vehicle's ASAP plan to U.S. EV plans
http://www.london.gov.uk/electricvehicles/ - is the project home site, and they have a bunch of information.
The plan seems to focus on fleet vehicles and not on individuals buying their own cars. The plan document doesn't say anything about individuals buying cars, and talks at length about government and corporate fleets.