Modelling results for one of the five valid candidates, EUCL J031741.85+412702.8. The six panels show, from left to right, top to bottom: the VIS cutout data, masked to a circle around the object; the model lens light and lensed source light distributions, convolved with the point spread function model; the normalised residuals on a colour scale between −3 σ and 3 σ; the lens light only; the lensed source light only, with the brightest parts of the lens light masked; and the reconstructed source plane model. The solid and dashed white ellipses in the image plane are the tangential and radial critical curves, with the corresponding caustics shown in the source plane. The image plane frames all have the same scale, as indicated in the first frame.