Wash the rabbit joints first of all, and place them (apart from the ribs, which don't carry much meat) in a large saucepan.
Tuck in the onion and apple among the meat. Now remove the rind from the bacon, chop the meat up into 1 inch (2.5 cm) cubes and add that to the saucepan along with the bayleaf, a little salt and some freshly milled pepper. Pour in the cider and the stock, bring to simmering point, skim off any bits of scum, then put a lid on and leave to simmer gently for about an hour or until tender.
When it's cooked, remove the rabbit pieces together with the bacon, apple and onion (with a draining spoon) and transfer them to the pie dish, sprinkling in the chopped prunes as well. Now mix the flour and butter to a smooth paste, then add this mixture to the stock in the saucepan, adding it in tiny (peanut-size) pieces, stir them round over a medium heat to melt and thicken the sauce. Sprinkle in the nutmeg and when the sauce reaches simmering point pour it over the rabbit.
Now make up the suet crust pastry.
Mix the flour, salt, pepper and suet together, then add enough cold water to form a fairly soft, elastic dough that leaves the bowl cleanly. Roll the dough out to a shape 1 inch (2.5 cm) wider than the top of the pie dish, and cut a 1 inch (2.5 cm) strip all round. Dampen the edge of the dish and press this strip around the rim of the dish. Now dampen the rim of the pastry, and place the pastry lid in position on top, pressing well all round to seal the edges, which can be decorated with fluting if you like.
Make a small hole for steam to escape, then bake for 30 minutes or until golden brown.
Pre-heat the oven to gas mark 7, 425°F (220°C).
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You will also need a 2½ pint (1.5 litre) pie dish.