In your bowl of raisins, squeeze the juice of your orange and 3 tbsp warm water, you can add a little more water to ensure the raisins are soaked properly. Set aside for 10 mins before draining.
In your mixing bowl, combine buttermilk, 1 tbsp sugar and yeast. Leave for 5 minutes for it to bloom (form a foamy surface).
Add in your 2 eggs and melted unsalted butter to the yeast mixture.
Sieve in the bread flour, brown sugar, white sugar, salt, all-spice, cinnamon and nutmeg.
Attach your dough hook and begin to knead the dough on low speed until it comes together to form a shaggy dough.
Toss in the raisins and orange zest, continue to knead the dough for 6-8 minutes, the dough might seem very soft and sticky. Use an oiled spatula to bring the dough together in one ball. Add a few drops of oil, cover and leave to rise in a warm place for 1 hour+.
When the dough has doubled in size, punch out the air, and divide into 8-10 equal portions. Form balls and lay them out on a lined baking sheet. Cover and let it rise again for 30 mins.
Brush with the mix of warm milk and egg.