Preheat oven to 400℉
In a large bowl, sift flour, baking powder and mix with sugar, salt and lemon zest
Cut butter into mixture with a pastry knife or rub it in
Gently fold blueberries into mixture
Make a well in the centre of the mix and add the cream
Stir carefully with a metal spoon to combine. Don't overmix.
Tip the mixture onto a floured board or silipad and with lightly floured hands, pat the dough into a circle
slice into 8-10 wedges with a pastry cutter or pizza cutter.
Brush the tops with heavy cream.
Put on an ungreased baking tray and bake for 15-20 min until the tops are lightly golden
Remove from oven and transfer to a cooling rack.
While the scones are cooling, make the glaze.