7 oranges
100²µ/3Β½΄Η³ϊ caster sugar
4 leaves platinum grade gelatine or 9 leaves regular gelatin, soaked in water for 10 minutes.
sunflower or vegetable oil, for greasing
200g/8oz plain chocolate, finely chopped (50% cocoa solids is fine)
1 litre/1ΒΎpints pouring double cream