Toss strawberries with sugar and lemon juice. Set aside for at least 30 minutes.
Preheat oven to 425°F (220°C). Line a baking sheet with parchment.
Whisk flour, baking powder, sugar, and salt. Work in cold butter cubes until the mixture is crumbly with pea-sized butter bits remaining. Add cream and vanilla, stir until a shaggy dough just comes together.
Press dough to 1 inch (2.5cm) thick on a floured surface. Cut 8 rounds with a 3-inch cutter, pressing straight down without twisting. Place on the baking sheet and brush tops with cream.
Bake 16 to 18 minutes until deep golden on top.
Beat cold cream, powdered sugar, and vanilla to soft peaks.
Split biscuits. Add strawberries and their syrup to the bottom half, then a spoonful of whipped cream. Place the top half on at an angle and serve immediately.