If you are considering buying a new car to drive in London then searching for a ULEZ checker is a good idea.
This is a crucial check for drivers who will be driving in and around London. ULEZ and LEZ checks are for the the Ultra Low Emissions Zone and Low Emissions Zones in London. If your vehicle does not meet the standards then you will have to pay a charge.
To check a vehicle based on the registration number, use this tool provided by TFL: