Preheat the oven to 180C/400F/Gas Mark 4.
Put flour, baking powder, sugar, butter and salt (if using unsalted butter) in a food processor and mix until the mixture resembles sand or breadcrumbs. If you don't have food processor simply use your fingers and rub the butter and flour mixture together until you get that sandy consistency. 250 g self-raising flour, 1 teaspoon baking powder, 2 tablespoon caster (fine) or granulated sugar, 75 g salted vegan block butter
Transfer your mixture to the large bowl and gently fold in blueberries taking care so that they don't burst. Add lemon zest (if using) at this point as well.
150 g fresh blueberries, zest of one lemon
Gently mix in the yogurt until the dough comes together. Make sure you don't work it too much though.
240 g plain vegan yogurt
Sprinkle some flour on your worktop and gently tip the dough out of the bowl. Without kneading too much, try and bring it together with your hands (dough scraper comes really handy here) to make a shape of rectangle 30cm/12inch long, 9cm/3.5inch wide and roughly 2cm/1inch thick.
Using a knife or a dough scraper cut the long rectangle into 4 equal size squares/rectangles and then cut each one of them into 2 triangles.
Place your scones on a prepared baking tray and bake for 15-20 minutes (depending on your oven) until nicely brown. Take them out onto a cooling rack and let them cool completely before glazing.
Prepare lemon glaze by mixing icing sugar with lemon juice to reach desired consistency and drizzle or spoon over the scones once cool.
65 g icing sugar, 1 tablespoon lemon juice
Enjoy!