Place all the cake ingredients in a mixing bowl and beat well with a wooden spoon until well mixed.
Spoon into a greased, and lined traybake tin.
Bake on the middle shelf of a pre-heated oven 180° C,160 ° C fan oven, Gas mark 4 for approximately 35-40 minutes.
Leave the loaf in the tin for 10 - 15 minutes before turning out and removing paper. Cool on a wire tray.
Place all icing ingredients in a saucepan and melt slowly until sugar has dissolved. The bring to the boil and boil for 3 minutes. Take off the heat and wait until slightly cooler. Beat well and then drizzle over the traybake. When set, cut into slices.