That this House notes the Government's plans to tackle Britain's air pollution crisis and improve air quality; further notes that reduced duty red diesel for certain uses costs HM Treasury £2.4 billion annually; believes that subsidising red diesel also inhibits the Government's plans to support the take-up of cleaner technologies and tackle air pollution effectively; notes that clean and affordable alternative fuels are available for some uses of red diesel, such as in transport refrigeration units; notes that if the UK's 84,000 transport refrigeration units became zero emission it would equate to taking 4 million Euro 6 diesel cars off the UK's roads; welcomes HM Treasury's red diesel consultation that was announced in the Spring Budget 2017 and closed in in June 2017; and calls on the Government to act and end red diesel subsidies for transport refrigeration units.