Preheat the oven
to 180C/350F. Line a 23 x 13cm/9 x 5in loaf tin with
greaseproof paper and then grease the paper.
With an electric
mixer, cram the butter an sugars until lightly and
fluffy. Add the eggs, one at a time, beating well
after eahc addtion.
Sift the
flour, bicarbonate of soda, salt and cinnamon over
the butter mixture and stir to blend. Then stir in
the wholemeal flour.
With a fork, mash
the bananas to a puree, then stir into the mixture.
Stir in the vanilla essence and nuts.
Pour the mixture
into the prepared tin and spread level. Bake until a
skewer inserted in the centre comes out clean, about
50-60 minutes. Leave to stand for 10 minutes before
transferring to a wire rack to cool completely.