Purchased a Jaguar from Stillmans. Process was simple and staff are friendly. Unfortunately car went back and they happily offered refund or swap. I chose swap. Definately recommend them for anyone looking to buy car.
Cars need to meet minimum emission standards when travelling in the Ultra Low Emission Zone (ULEZ) or the daily charge must be paid.
Petrol: Euro 4
Diesel: Euro 6
The ULEZ will be enforced based on the declared emissions of the vehicle rather than the age. However:
Information from Transport For London
Check this car on the TFL website before purchasing: https://tfl.gov.uk/modes/driving/check-your-vehicle/