01 - Combine bread flour, granulated sugar, instant yeast, ground cinnamon, allspice, nutmeg, and fine sea salt in a large bowl.
02 - Add softened butter and orange zest to the dry mixture. Pour in lukewarm whole milk and add the large egg, mixing until a shaggy dough forms.
03 - Knead the dough by hand or with a stand mixer for 8-10 minutes until smooth and elastic.
04 - Fold in the currants or raisins until evenly distributed throughout the dough.
05 - Place dough in a lightly oiled bowl, cover, and let rise in a warm place until doubled in size, approximately 1 hour.
06 - Turn dough onto a lightly floured surface. Divide into 12 equal pieces and shape each into a smooth ball.
07 - Arrange buns on a parchment-lined baking tray, leaving space between each. Cover and let rise for 45 minutes until puffy.
08 - Preheat oven to 400°F.
09 - Mix plain flour and water to form a thick paste. Transfer to a piping bag and pipe a cross over each bun.
10 - Bake for 20-25 minutes until golden brown.
11 - Warm apricot jam with water and brush over hot buns for a shiny finish.
12 - Cool on a wire rack. Serve warm or at room temperature with salted butter or clotted cream.