Make the filling first because it will need to cool. Add cranberries, sugar and water in a saucepan, stir, and bring to a simmer over medium heat. Cook for about 10 minutes until most of the cranberries have popped. Stir frequently, especially towards the end as it will thicken a lot.
To make the scone dough, whisk the flour, sugar, baking powder and salt in a large bowl. Cut butter into mixture and mix with your fingers until the mixture is crumbly.
In a separate bowl, whisk cream, eggs, and vanilla then mix into dry mixture.
Form four balls and flatten them one at a time on a lightly floured surface. The dough disc should be about ½ inch thick. Cut the disc into four wedges by making a vertical cut then a horizontal cut.
Move each triangle wedge to a parchment lined baking sheet. Shape the wedges so that they are triangle shape (versus any rough edges from the disc flattening).
Using your thumbs in the center of each triangle, and your fingers on the edges, make little divots in each triangle.
Brush each triangle with cream.
Add a teaspoon (or more) of cranberry filling to each divot.
Sprinkle the triangles with sugar.
Bake in a preheated 425 degree oven for 12 minutes, until very lightly browned.
Put lemon curd in a pastry bag or in a ziplock and cut the tip. Drizzle lemon curd over each scone.