Preheat the oven to 400 F
Whisk together the flour, salt, baking powder and sugar.
Cut cold butter into the flour until the mixture is unevenly crumbly with some of the butter remaining in larger pieces.
Add in the bluberries and gently mix it in the flour. Be careful not to squish the blueberries as they might burst
Make a well in the center and pour in the heavy cream.
Fold in everything gently until everything is incorporated properly but do not overwork the dough.
Place the dough on a well floured surface
Press the dough into a 1.5 to 2 inch thick circle. Be careful as always not to be too rough as the blueberries might break
Cut into 4 equal pieces
Brush each piece lightly with heavy cream. This is to ensure the scones get a golden glaze when you bake them
Place the scones on a baking tray lined with parchment paper or baking sheet
Bake for around 15 to 20 minutes or untill the scones are beautifully golden brown
Let the scones cool a bit before digging in