
LONDON, ENGLAND - MARCH 16: A sign informing motorists that they are entering the Congestion Charge zone , which incurs an 8GBP fee, stands on March 16, 2009 in London. London Mayor Boris Johnson is considering introducing a variable rate for motorists paying the Congestion Charge dependent on the time of day they enter the zone. One option in the plans being considered could see the implementation of a higher fee for motorists entering the zone during rush hour.
Oli Scarff/Getty
Ross Lydall @RossLydall|Josh Loeb