Caramel apple loaf cake

INGREDIENTS

• 175g soft butter , plus extra for greasing
• 175g golden caster sugar
• 1 tsp vanilla extract
• 2 eggs
• 225g self-raising flour
• ½ tsp cinnamon
• 4 rounded tbsp Greek yogurt
• 2 eating apples
• 50g walnuts , very roughly chopped, plus 1 tbsp extra, chopped
• 50g soft toffees (we used Werther's chewy toffees)
• 2 tbsp double cream