Diesel 4x4 utility vehicles over 1.2 tons unladen are now included in the LEZ so if you live down south and plan on being able to drive inside the M25 anywhere, you might want to sell your pre 2002 Diesel 4x4 before everyone finds out and the bottom drops out of the market and buy a newer or petrol powered one, you got 'til 2012.
http://www.tfl.gov.uk/roadusers/lez/











