Melt butter and corn syrup in heavy saucepan
Measure brown sugar in a cup and stir in gelatine to mix thoroughly
Add to saucepan stirring to dissolve
Add condensed milk. Bring to a boil. Boil x 5 minutes, stirring
constantly as it burns easily when boiling. Remove from heat.
Beat with a spoon for 7-10 minutes until it is thick and shiny, like
Pour over first layer. Chill overnight. Invert on to plastic wrap. This
makes it easier to cut through. Cuts into 25 squares.