Preheat the oven to 190°C/gas mark 5. Line a 12 muffin tin with muffin paper cases and set aside.
Peel and mash the bananas and set aside.
In a small bowl, add the oil and eggs together.
In a large bowl add the flour, sugar, bicarbonate of soda and baking powder. Add the egg and oil mixture, along with the mashed bananas and mix together.
Add the chopped toffees and combine together.
Divide the mixture between the muffin cases and bake in the oven for 20mins or until they spring back when light pressed in the middle.