While Ken Livingstone prepares to slap punitive charges on oversized SUVs and gloats over the drop in SUV sales, Westminster City Council has
installed free recharging stations for electric cars and bicycles. These are devices that look like parking meters, and are located in Covent Garden (where London's first hydrogen fuel cell bus also goes). Both parking and electricity are free (albeit there's a 3 hour limit), so in addition to not having to pay the congestion charge, you get your fuel paid for by the council. Assuming that someone else with an electric vehicle hasn't gotten there before you.
I suspect that free charging stations won't last after electric cars become more popular; after all, someone has to pay the bill. I guess there's sustainability and then there's sustainability.