Preheat the oven to 180C and line a baking sheet with greaseproof paper.
Place the flour and baking powder in a bowl and add a pinch of salt. Rub the margarine into it with your fingertips until the mixture resembles breadcrumbs.
Make a well then add the Natvia and berries. Gently heat the milk then stir in the lemon juice and vanilla. Pour this into the bowl gradually and bring together to form a dough.
Lightly dust the surface with flour and knead the dough. Roll out to about 4cm thick and cut out 8 scones using a 6cm cutter.
Place on the baking sheet, brush each one with extra milk and bake for 15-20 minutes until golden.
Meanwhile make the jam: Place the berries and Natvia in a pan with a dash of water. Simmer for 5 minutes to soften then remove, mash up and stir in the chia seeds. Set aside for 10 minutes to thicken then keep in the fridge until needed.
Serve warm with chia jam and some dairy-free soft cheese!