Comparison of transit duration variations for different models. Left: Posterior transit duration variations of planet b up to the end of the year 2100 from 1,000 random draws from the posterior distribution of the two-planet photodynamical modelling (Section 6), three-planet photodynamical modelling (Section 7.8), and coplanar two-planet photodynamical modelling (Section 7.3). The colours correspond with the ones used in Figure A.4. The points with error bars are the durations measured on individual transits (Section 7.3). Right: Zoom of the plot on the left.