Technology developed to reduce harmful emissions and retro-fitted to two refuse collection vehicles (RCVs) in Westminster has cut nitrogen oxide levels by 99 per cent, resulting in lower emissions than newer Euro 6 vehicles.

The system, which replaces existing exhaust systems and filters of heavy-duty diesel vehicles, has been developed by Eminox in partnership with Westminster City Council and Veolia.

It has been successfully trialled on two Westminster City Council Euro 5 RCVs which means the trucks will beat the Ultra Low Emission Zones (ULEZ) target set by Transport for London.

It works by combining a Diesel Particulate Filter with Selective Catalytic Reduction and Amminex ASDS technology. In the trial, the combination raised two busy, older diesel vehicles to Euro VI standards.

Cllr Tim Mitchell, Cabinet Member for Environment and City Management, said: 'Poor air quality is a major concern for our residents ' that's why we're using new technology to tackle the problem in a world first.

'Westminster is a leader in improving air quality and councils across the UK have eagerly followed the project's progress. Investing in technologies like this scheme is how we're creating a healthier and greener city'

'We've struck up an excellent partnership with Eminox and Veolia and look forward to witnessing what our hard work delivers in the near future'

Carlos Vicente, Eminox Retrofit Sales Director, said: 'We have been working with Westminster Council for many years and they have always been early adopters in clean air technology.

'The support from Westminster for this project has enabled us to collaborate with Veolia and Amminex to develop real world Euro 6 ULEZ solutions for the most prestigious RCV fleet in the country'

Pascal Hauret, Regional Director for Veolia London, said: 'As one of the UK's largest fleet operators, we play a crucial role delivering cleaner air for London and across the UK. Veolia has been trialling low emission vehicle technologies with industry leaders like Eminox since 2012, and we're now ideally placed to support the shift to low emissions, improving air quality in Westminster and beyond.

'We're delighted to have worked with Westminster City Council and Eminox to lead the waste sector in adopting this technology which represents a huge opportunity for cities across the country'

Westminster City Council has committed to retrofitting its vehicles with the invention, should it be successfully accredited under the Clean Vehicle and Retrofit Accreditation Scheme (CVRAS) for ULEZ.

The two Westminster City Council vehicles used in the trial will continue to run with the installed system, while the remainder of the fleet will be fitted ahead of ULEZ starting in April 2019.