New Congestion Charge for Londoners from October 2008...
Cars up to 120g/km CO2 are exempt.
Cars from 121 to 225 pay 'standard' charge of £8
cars from 225 upwards pay £25, but only if registered after 1 March 2001.
Alternative Fuel cars (i.e. Hybrid and Gas) are no longer automatically exempt, instead they will have to pay liken everyone else based on CO2 emissions.
There is however something to slightly sweeten the pill for those who just bought new a Prius, any alternative fuel car registered with TFL prior to October 2008 will continue to benefit from charge exemption until January 2010 provided the car did not change ownership.
Now both my cars are above the 225 limit, but while one is R98 so will keep paying £8, sadly the Omega was registered in June 2001 so will attract the £25 charge...
My options are to wither sell it and get an older Omega (e.g. a nice 3.0L x-reg facelift), or buy a newer small car.
The wonders of Mr. Livingston... if I sell my 2.6L car and buy an older one with a 3.0 L engine I pay the lower Congestion Charge

but either way my 2001 Omega will have to go

watch the 'for sale' section
