If you want to make it yourself here is the recipe:-
Classic Banana Loaf Cake
Makes 1 large loaf
170g Butter
240g Caster sugar
3 Eggs (medium)
4 Bananas, very ripe, mashed
370g Self raising flour
1 Tsp Baking powder
50ml Milk
Method
1. Pre-heated oven at 160C fan/180C conventional/Gas 4
2. Cream together the butter and caster sugar until fluffy and pale in colour.
3. Beat in the eggs, one at a time.
4. Add the mashed bananas, self raising flour, baking powder and milk and mix until combined.
5. Spoon cake batter into a greased and lined 1Kg loaf tin.
6. Bake for 1 hour 15 minutes. Insert a skewer into the centre of the loaf - if it comes out clean, the cake is cooked. If not, return to the oven for a few more minutes.
7. Remove from the oven and leave for 10 minutes, before turning out onto a cooling rack.
Then eat it. But be warned! Don't expect it to last too long, as everyone will demand more slices!