Put on a very large pot of water to come up to the boil.
Sift the self-raising flour into a very large mixing bowl, followed by the allspice. Mix thoroughly.
Using a box grater, grate the cold lard into the bowl.
Using your fingers, rub the lard into the dry ingredients until it is completely incorporated.
Add in the brown sugar. Mix thoroughly.
Add in the raisins and currants, followed by the mixed peel. Mix thoroughly.
In a separate bowl, whisk the eggs.
To the eggs, add the milk, golden syrup and brandy. Whisk thoroughly.
Pour the egg mix onto the dry ingredients and stir very well to ensure that there is no dry mix left at the bottom of the bowl.
Place your calico in a large colander in the kitchen sink and drench it with a full kettle of boiling water. Wearing rubber gloves, wring out the wet calico to remove any excess water. You want it to be hot and damp, but not dripping.
Lay the calico on a clean flat surface and evenly dust with the extra sifted flour, leaving a border around the edge free of flour (roughly 20cm).
Transfer the dusted calico to a large colander, arranging the fabric so that it lays flat in one layer within the colander, and the edges of the fabric hanging over the sides. (You will need two pairs of hands for this to ensure the flour is not too disturbed). The floured part of the fabric should be within the colander, while the overhang should be clean.
Scrape the batter into the calico and gather the edges of the fabric together so that the batter is completely enclosed.
Secure the calico as tightly as possible with the extra strip of fabric, including a loop so that the pudding can be hung to dry. Make sure that you leave some room between the top of the pudding and the tie, to allow for the pudding to expand while cooking (roughly 2 inches).
Place the china dinner plate at the bottom of the pot of boiling water and then add the pudding in its calico, so that the base of the pudding is resting on the plate. The pudding should be fully covered by the water.
Boil the pudding for six hours, topping up the water levels as needed. The water should be soft boiling.
Remove the pudding from the boiling water (washing-up gloves recommended to protect your hands.) Place it in the colander to cool for a few minutes.
The pudding is now ready to be hung and dried until Christmas Day. The pudding should be hung in a cool, dry location away from direct sunlight, but with good ventilation (pantry, spare wardrobe, garage). It is important that the pudding is dried as quickly as possible to prevent mould from developing. I would recommend putting it in front of a fan for a few days to expedite this process.
To prevent mould from forming, when the cloth has dried, wipe all over with a brandy soaked clean cloth.