Micro-scale air quality modelling refers to air quality modelling at high spatial resolution (typically down to a scale in the order of one meter), usually focused on urban environments. Based on discussions within the FAIRMODE community, it is noted that this type of modelling applications is more and more used in an AQD policy context. This evolution is driven by the fact that more and more exceedances occur at local hotspots which require high spatial resolution for understanding their causes and setting up specific and localized measures to mitigate the problem. The focus points of this crosscutting task are: