If you see an excessively smoky bus or lorry, you can report this to the Driver and Vehicle Standards Agency (DVSA).
Reporting a smoky vehicle
Report a smoky vehicle via GOV.UK, you'll need to provide:
- the vehicle registration number
- the type of vehicle (for example, a bus or lorry)
- the date, time and place that you saw the vehicle
- the name of the vehicle operator (if possible)
Also see
Public Protection - Air Quality
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