Eat this!...Banana muffins

Man these were good. Asda was selling off bananas for 20p per kilo so what could I do but buy stacks and stacks. Much banana related cookery resulted but these really were the star of the show. Made a couple of dozen and froze them. They are fantastic straight out the freezer and into the microwave. Yum.
9 oz plain flour
1tsp baking powder
1 tsp bicarb
1 tsp cinnamon
1/2 tsp nutmeg
3 large bananas
1 egg
2 1/2 oz brown sugar
50 mL vegetable oil
as many raisins as you like.
Mash the bananas and beat in the egg, sugar and oil. Add the dry ingredients and beat in gradually. Add the raisins. 3/4 fill muffin cases and bake at gas 5 for 20-25 mins.