1. Time delay lens modelling challenge. Issue 1 (22nd February 2021) Authors: Ding, X; Treu, T; Birrer, S; Chen, G C-F; Coles, J; Denzel, P; Frigo, M; Galan, A; Marshall, P J; Millon, M; More, A; Shajib, A J; Sluse, D; Tak, H; Xu, D; Auger, M W; Bonvin, V; Chand, H; Courbin, F; Despali, G Journal: Monthly notices of the Royal Astronomical Society Issue: Volume 503:Issue 1(2021) Page Start: 1096 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗