Preheat the oven to 350f/80c
Grease a loaf-pan.
Whisk the butter, honey and sugar in a large bowl for 5 minutes.
Add the eggs on at the time and mix.
In a food processor puree the dates and banana, and add this to the bowl and mix in.
Mix the flours, baking powder and salt and fold it it along with the milk.
Spoon into the prepared loaf pan and level the top.
Put it in the oven and bake for an 1 hour or until a tester inserted and comes out clean.
Let it coll in the pan for 10 minutes before turning out.