Correction for ‘EPR imaging of sinapyl alcohol and its application to the study of plant cell wall lignification’ by Clémence Simon et al., Chem. Commun., 2021, DOI: 10.1039/D0CC05218C. Some late changes to the published article were not incorporated: Table 1: in the heading “τc (s−1)” should read “τc (s)”. p. 4 – LHS line 16: “are even more immobilized” should be replaced by “reflect immobilized species that are nevertheless more mobile than IIIB”. p. 4 – LHS line 19: “thereby enabling it to enter into denser and/or smaller cell wall spaces that are less accessible to 3” should be replaced by “than 3” The sentences starting, p. 4, LHS line 13, should thus read: “Whereas IVA exhibits a mobility very similar to the previously observed IIIA (Azz = 17 G, τc = 2 and 3 ns, respectively), the two other contributors IVB and IVC to the EPR signal reflect immobilized species that are nevertheless more mobile than IIIB (τc = 46 and 87 ns, respectively). It could be hypothesized that the length of the PEG4 spacer arm and its flexibility allows probe 4 to explore a larger environmental pocket around the tagged lignin site than 3.” The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.