Line a baking tin with baking paper. The tin should not be any larger than 20 cm.
Break up the three Terry's chocolate oranges, add the whole lot to a saucepan along with the tin of condensed milk.
Cook over a medium heat, stirring continuously until it has all melted together and is completely smooth.
take it off the heat, sift in the icing sugar and beat until it is all mixed in.
Pour the mix into the baking tin and spread it evenly into the edges.
Press the mini chocolate orange segments into the top of the fudge. You may want to leave it a minute or two to cool slightly before this step to prevent the segments from melting.
Place into the fridge to set for a few hours.
Cut it into small portions and serve. Store it in an air tight container either in the fridge or at room temperature.