Visible light photoredox-catalysed remote C–H functionalisation enabled by 1,5-hydrogen atom transfer (1,5-HAT)

)-H bond functionalisation. There is a recent resurgence in this research field due to the emergence of visible light photocatalysis. This tutorial review summarises the recent progress in the remote functionalisation of C-H bonds featuring a key 1,5-HAT step with particular focus on photoredox-catalyzed remote C-H functionalisation.