This paper by Kalyca Baker, Brigit Maguire, Galina Daraganova and Mark Sipthorp describes the linkage process and the structure of the My School data linked to the LSAC data; explains how the data were confidentialised; describes the distribution of schools in the LSAC sample and outlines some considerations about the data that researchers using the My School data linked to the LSAC data file should be aware of.