Preheat oven to 400⁰F (205⁰C). Prepare muffin tin.
In a large bowl combine the wheat bran, flour, porridge oats, cinnamon, baking powder, baking soda, seeds and raisins.
In medium bowl, beat the banana, sugar, egg, milk, oil and vanilla.
Add the wet ingredients to the dry ingredients, and stir just until moistened.
Evenly scoop batter into muffin tin.
Bake for 15-18 minutes.