Combine flour, sugar, orange zest, baking powder, salt and baking soda in a large bowl
Using a pastry cutter, cut in butter until coarse crumbs form
In a small bowl, whisk egg with milk
In another bowl, add orange juice and cranberries. Let soak together for 10 minutes. Then combine with the egg and milk mixture
Add cranberry mixture to the flour mixture until a soft dough forms. Knead on a lightly floured surface. Pat into a round circle and wrap in plastic wrap. Refrigerate for 30 minutes
Remove from refrigerator and roll out dough to at least 1" thick and cut into 8 wedges. Separate wedges and place on a parchment lined baking sheet
Bake
Preheat oven to 400°F
In a bowl mix together 1 tbs milk and 1 tbs sugar. Using a pastry brush, coat the tops of the unbaked scones
Bake for 12-15 minutes at 400°F
Glaze
Mix together orange juice and powdered sugar to make a glaze. Pour over top of scones once they come out of the oven