How to make UV Jelly using Leaf Gelatine
Soak a number of the leaf gelatine sheets (3B1) in cold water for 5 minutes (a larger number of sheets will need to be used to make a firmer jelly - try 10 sheets initially).
Meanwhile heat but not boil 1/2 pint of tonic water with 1/2 pint of water.
After 5 minutes remove and squeeze the excess water from the gelatine.
Then add to the tonic/water mix and stir well until all dissolved.
Pour into a suitable container (having greased the inside beforehand) to cool and place in the fridge to set.