Preheat your oven to 375° F (190° C). Line a rimmed baking sheet with parchment paper.
In a large bowl, whisk together flour, sugar, baking powder, salt, and lemon zest.
Using a pastry blender or your fingertips, cutter butter into the mixture until it resembles course crumbs.
In a small bowl, whisk the cream, egg, and vanilla. Add this to your flour mixture until a shaggy dough begins to form. Gently bring the mixture together with your hands until the dough comes together. If the mixture is too dry, add cream 1 Tbsp at a time. The dough should be somewhat firm.
Turn your dough out onto a lightly floured surface and knead gently until smooth by patting the dough down and folding in half 4-5 times. Do not overmix, or your scones will be tough.
Using a rolling pin, roll out the dough to 1/2 inch (~1.25cm) thickness, and cut a line down the middle. Scatter half of your strawberries over one HALF of the dough. Repeat this step once more, then gently do a final roll out of your dough to 3/4inch (~2cm) thickness.
Using a 2 1/4 inch (~5.5cm) round cutter dipped in flour, cut out as many scones as possible from the dough. Do not twist your cutter as you push down. Reroll your scraps as necessary.
Place scones 2in (~5cm) apart on the baking sheet. Place baking sheet in the freezer 15 minutes.
Brush the tops of scones with remaining cream, and bake until golden brown - 12-15 minutes. Serve warm, and enjoy!