Step 1: 1)take a frying pan and place it on stove on slow heat.
Step 2: 2)add cadburry dairymilk chocolate bar into the pan and stir it until it melts.
Step 3: 3)then add ferrero nutella+kiri cream into the melted chocolate and keep on stirring.
Step 4: 4)remove the pan from the stove and allow it to cool.
Step 5: 5)in a blender add the above mixture+thick cream+milk+dream whip cream and blend it until the mixture shows creamy texture.
Step 6: 6)now take a rectangular dish and make a layer of biscuits and above that make a layer of the chocolate mixture and go on making layers in the same way.
Step 7: 7)in the end make the topping with maltesers and cadburry flake.
Step 8: *chocolate mousse is ready to be served*