Since 2013, the Government has awarded over £27 million to retrofit almost 3,000 of the oldest vehicles through schemes like the Clean Bus Technology Fund (CBTF) and the Clean Vehicle Technology Fund (CVTF). Retrofitting refers to all or part of an engine being modified with pollution reducing technology and includes technologies such as Selective Catalytic Reduction which usually use an aqueous urea, such as AdBlue. Retrofitting has the potential for significant reductions in nitrogen dioxide emissions.
In the 2016 Autumn Statement, the UK Government committed a further £100 million in support for low emission buses. Part of this funding will be used to reduce the emissions of 1,500 buses through retrofitting the vehicles to meet tougher emissions requirements. Later this year the Government will announce how this funding will be distributed, including how various bodies, such as local authorities, can apply.
The Government is also establishing a retrofit technology accreditation scheme, which will provide independent evidence that a vehicle retrofit technology will deliver the expected pollutant emissions reductions and air quality benefits.