Instantaneous position of particles selected near the edge of the bar (shaded regions in Fig. 2) at the start of the simulation for the thin (left) and thick (right) disc. The x- and y-axis are normalised to the bar length r_bar. The solid black circle gives the average radius of these stars at the end of the simulation and the dashed black circle delineates the OLR. The inset shows a histogram of the guiding radii of these stars at the start of the simulation. The guiding radii of the thin disc stars are quite similar to the instantaneous radius of the particles, while the guiding radii of the thick disc stars are limited to a smaller range than the instantaneous positions because these stars have larger radial excursions. The size and colour of the points indicate the angular momentum of these particles at the end of the simulation. The stars born at larger radii are also the ones that have larger angular momenta at the end of the simulation.