Pour the milk and hot tea into a large measuring jug and add the dates, making sure they are fully submerged. Set aside for 15 minutes.
Blend the date mixture until smooth using an immersion blender.
Pre-heat the oven to 170°C / 150°C fan assisted oven / gas mark 4 and line and grease a 9 inch loaf tin.
Pour the treacle, sugar and sultanas into a small saucepan and heat until the sugar has melted into the treacle.
Turn off the heat then add to the blended date mixture along with the mashed banana, stirring well to combine.
Whisk the flours together in a large mixing bowl with the bicarbonate of soda, baking powder and salt.
Make a well in the centre of the flours and whisk in the egg and the date/sugar/banana mixture.
Bring the flours into the liquid ingredients then stir everything together until completely combined.
Pour the mixture into the baking tin and bake for 45 minutes, or until an inserted metal skewer comes out clean.
Remove from the oven, turn out of the tin and cool on a wire rack.
When the loaf is at room temperature, brush the surface liberally with the warmed apricot jam then wrap in greaseproof paper and store in an airtight container. Leave the loaf to mature for at least 24 hours before serving so the loaf gets lovely and sticky.