Also, for data-related tasks, there's the DataKind group. Their UK chapter is very active: https://www.datakind.org/chapters/datakind-uk https://www.datakind.or

Also, for data-related tasks, there's the DataKind group. Their UK chapter is very active: https://www.datakind.org/chapters/datakind-uk https://www.datakind.org/chapters/datakind-uk