Preheat the oven to 180C. Grease and line a 20cm cake tin.
Add the brown sugar to a large mixing bowl. Mix with a wooden spoon to get rid of any lumps. Add the margarine or butter and mix together until light and creamy.
Add the poppy seeds, ground almonds, flour, beaten eggs, zest of the lemon, vanilla essence and rapeseed oil and mix well.
Peel the apples, remove the cores and chop into small cubes. Place into another bowl and mix with some lemon juice, honey and mixed spice.
Add the apples to the cake mixture along with the mixed berries and carefully fold in.
Pour the mixture into the prepared cake tin. Bake for 25 - 30 minutes.
Prepare the drizzle by mixing a little lemon juice with some brown sugar or honey.
When cooked, leave the cake in the tin and prick all over with a fork. Pour the drizzle over the top. Leave for 5 minutes, then remove from the tin and allow to cool on a rack.