Summer Berry Meringue (Pavlova)

This is my sister Munira's recipe

4 egg whites

200g of castor sugar

250ml carton double cream; whipped

500g berries , raspberries, red currents, blackberries, strawberries

1. Heat the oven to 160^oC or gas mark 4.
2.  Line a baking tray with parchment paper.
3. Whisk the eggs until stiff, add sugar slowly; a table spoon at a time.
4. Place on the  baking tray, making a big circle (20cm)
5. Place in the oven, turn down the temperature to 120^oC / gas mark 1, bake for an hour.
6. Let it cool complete, lift and place on a serving dish
7. Fill the centre with the whipped cream
8. Top with the berries.