Giant jaffa orange cake - Good Food Middle East

Ingredients

• 250g pack butter, softened, plus extra for greasing
• 300g golden caster sugar
• 4 large eggs
• 100g full-fat natural yogurt
• 300g plain flour
• 2 tsp baking powder
• zest 4 large orange (use the oranges below)
• juice 5 large oranges (about 500ml), save the zest of 1 orange to finish
• 100g golden caster sugar
• 6 gelatine leaves
• 300ml pot double cream
• 200g milk chocolate, finely chopped
• 100g dark chocolate, finely chopped
• 2 tbsp apricot jam
• zest 1 orange