Simulated ZIMPOL images of the different mass and orbit radius cases studied. Upper to bottom rows correspond to a 3   Myr disc model with a planet of masses M_p =  [1,9,15]    M_Jup, respectively. Left to right columns show the different planet orbit cases, R_p =  [20,40,60]    AU, respectively. The white dot indicates the position of the planet in each image and the black contour lines correspond to the intensity ring detected by ALMA at 850   μm.