Preheat oven to 200°C. Line a 12-hole medium or large muffin pan with paper cases.
Sift flour and cinnamon into a medium mixing bowl. Stir in a pinch of salt, bran flakes and dried fruit.
In a large mixing bowl, whisk together golden syrup, oil, banana, vanilla, eggs, yoghurt and baking soda until smooth.
Fold the flour mixture into the wet mixture with a large metal spoon until combined, being careful not to over-mix.
Spoon into cases and sprinkle with both the seeds and cacao nibs (if using). Bake for 20-25 minutes or until risen and the tops are lightly golden and spring back when gently pressed. Take out of oven and leave to stand for at least 5 minutes before removing from tin.