Manufacturers and fitters must be accredited to offer approved devices and services.

Getting accredited

Manufacturers of abatement equipment need to get their equipment accredited by one of our recognised certification bodies before it can be added to the list of approved devices available to operators. This ensures that approved filters meet minimum technical standards and that vehicles fitting these approved filters meet the Low Emission Zone (LEZ) emissions standards. 

Manufacturers of pollution abatement equipment in Great Britain

It is the responsibility of manufacturers and suppliers to certify their pollution abatement equipment.

Pollution abatement equipment can be added to the Low Emissions Certificate (LEC) Approved Devices List if evidence is provided to one of our recognised certification bodies that it meets reduced emissions requirements.

Certified abatement equipment can also be added to the Reduced Pollution Certificate (RPC) Approved Devices List if evidence is provided to the Vehicle Certification Agency that it meets all scheme requirements.

LEC approved device list

PDF 47KB

LEC guidance notes for applicants

PDF 113KB

LEC technical requirements for manufacturers

PDF 145KB

LEC certification body application form

PDF 87KB

LEC company approval guidance notes

PDF 115KB

LEC general approval checklist

PDF 102KB

TfL-appointed LEC certification bodies

PDF 15KB

Manufacturers of pollution abatement equipment outside Great Britain

Vehicles not registered in Great Britain and fitted with abatement equipment may register with us providing evidence that they meet the required emissions standards for particulate matter (PM).

We will require evidence of the equipment fitted to the vehicle, and the resulting emissions levels for PM. This evidence will be:

  • The vehicle registration documents
  • A declaration of fitting of the pollution abatement equipment. This must clearly identify the equipment fitted, the vehicle details and the PM emissions standard achieved, together with the national type approval or certification authority which has certified the emissions achieved

Manufacturers are advised to contact us if they are uncertain as to whether their device meets LEZ emissions standards.