STEP 1 Preheat oven to 200°C/180°C fan-forced. Line a 20cm (base measurement) square cake pan (alternatively use a baking tray) with non-stick baking paper.
STEP 2 Sift flour, baking powder, icing sugar and salt into a large bowl. Stir in blueberries. Make a well in the centre. Mix cream, sparkling water and lemon juice in a jug. Quickly pour into dry ingredients. Using a flat-bladed knife, mix until a rough dough forms.
STEP 3 Turn out onto a lightly floured surface and gently knead dough until smooth. Press out dough until 3cm thick. Using a 5cm-wide floured cookie cutter (or a glass), cut out 12 rounds and arrange in prepared baking pan. Lightly brush with cream. Bake for 20-25 minutes until puffed and pale golden. Remove scones from pan and wrap in a clean tea towel. Stand for 15 minutes.
STEP 4 Dust scones with icing sugar. Serve with blueberries and whipped cream.