Line the domed mixing bowl with clingfilm, leaving enough to hang over the sides. Set aside 200ml of the cherry juice for use later. Dip a brioche slice into the remaining juice and use to layer the bottom of the bowl – you might need to tear beforehand to fit neatly. Add a little less than a third of the cream-cherry mixture, using a palette knife or spatula to level out. Repeat with the brioche, tearing and dipping before layering with the cream mixture. If you need a little more cherry juice, take a few extra tbsp from the reserved juice. You should have three layers of the cream mixture, finishing with a final fourth layer of soaked brioche. Lay the overhanging clingfilm over the top, then put a plate on top. Rest a heavy tin on top of the plate to weight it down, then chill for at least 4 hrs.