The final stage is to compact the terrine a little. I use a block of polystyrene cut to fit the shape of the dish (but a piece of thick cardboard would do just as well), covered with
aluminium foil. I place this on top of the contents of the terrine and stand two jars of jam on top. The weight of the full jars is enough to press the terrine.
Leave to cool for 2 hours at room temperature, then refigerate.