Prep Work: In a large bowl, whisk together the 4 cups of flour, sugar, yeast, salt, mixed spice, and cinnamon. Make a well in the center.
Mix It Up: Pour the melted butter, warm milk, and beaten eggs into the well. Stir until you get a sticky dough. Fold in the dried fruit until evenly distributed.
Knead & Rise: Turn the dough onto a floured surface and knead for about 10 minutes until smooth and elastic. Place it in a greased bowl, cover with a damp cloth, and let it rise in a warm place for 1 hour or until doubled in size.
Shape & Second Rise: Punch down the dough, then divide it into 12 equal pieces. Roll each piece into a ball and place on a baking sheet lined with parchment paper. Cover and let rise for another 30 minutes.
Preheat & Prepare Crosses: While the buns are rising, preheat your oven to 375°F (190°C). Mix the flour and water for the crosses to form a thick paste. Pipe or spoon this paste over the buns to form crosses.
Bake & Glaze: Bake for 20-25 minutes until golden. While they're baking, heat the sugar and water for the glaze until the sugar dissolves. Brush the warm buns with glaze as soon as they come out of the oven.