In a large bowl mix the yeast with the teaspoon of sugar and ¼ cup of the milk. Set aside to proof.
In another bowl mix 3 ½ cups of the flour, salt, and spices together. Blend in the butter with your fingertips, then blend in the sugar.
When the yeast mixture has begun to bubble, stir in the remaining ¾ cup milk and beat in the eggs. Add the flour mixture and mix well with a wooden spoon. Add enough additional flour to form a ball of dough and stir together. Stir in the raisins, currants. At this point the dough will still be fairly wet. Place it in the fridge for 15 minutes.
Take the dough out of the fridge and knead it in the bowl, then turn out onto an oat-floured-surface to finish. Gently knead the dough together until it is smooth and fairly firm but not stiff. Cover the bowl with a clean towel and set aside in a warm place until the dough has doubled in size, about 1 hour.
Butter and line a 10-inch round baking pan with parchment paper. Punch down the dough and transfer it to the pan. Cover and allow to rise for 30 minutes.
Preheat oven to 350℉. Bake for 1 hour, until browned. Turn out onto a wire rack and allow to cool completely.