Scottish Oatmeal bread

Ingredients

• 2 1/2 cups unbleached white bread flour plus 1/4 cup more as needed
• 1 3/4 teaspoons table salt
• 3/4 teaspoon instant yeast
• 3/4 teaspoon ground allspice
• 1/8 teaspoon nutmeg
• 1 1/4 cups ice water plus more if needed
• 1/2 teaspoon orange zest finely grated
• 2 tablespoons unsalted butter room temperature
• 3/4 cup old fashioined oats
• 2/3 cup boiling water
• 6 tablespoons brown sugar packed
• 2/3 cup dried currants or cranberries