Grease a 2lb loaf tin and line the base and sides with baking paper. For the cake, place the Greek yogurt, lemon curd and Flora Buttery in a large bowl and mix with a spoon till smooth. Add in all the remaining ingredients (except the lemon juice) and mix together well till you obtain a smooth, creamy cake batter. Place ½ of the mixture into the prepared loaf tin, sprinkle over the blueberries, then top with the remaining cake mixture. Bake in the oven at 160`c for approximately 1 hour 15 minutes, or until cooked through. Allow to cool down completely then turn out onto a serving plate. Mix the icing sugar with the lemon juice to form a thick icing, then drizzle over the cake to decorate. Allow to set before serving.