In a bowl, mix the flour, mixed spice, and baking powder.
Add the cold cubed butter. Using the tips of your fingers, rub the butter into the flour until you have an even crumb.
Slowly add the milk while mixing using a flat knife. The mixture should start to clump together.
Add the sultanas, grated carrot, and orange zest and stir to distribute.
Tip the dough onto a floured surface and gather together, handling just enough to form into a disc about 18cm wide. Use a knife or cake scraper to divide into 8 wedges.
Lift the scones into the lined baking sheet, spacing them well so that the heat can circulate.
Brush the tops with milk.
Place the tray in the centre of your preheated oven and bake for 25-28 minutes until the scones have puffed and turned golden.
Make the topping
Whisk the cream cheese and icing sugar together to create a thick icing.
Spoon evenly over the scones and top with one carrot-shaped cake decoration per scone, if you like.