1. Put the water, except for tbsp, the sugar, and the jelly into a pan and heat until the sugar has dissolved.
2. Soften the gelatine in the rest of the water in a small heatproof container.
3. Stand the container in a pan of hot water and stir until dissolved.
4. Add to the syrup, with the port and the cochineal.
5. Strain through a single thickness of muslin or fine cotton into a wetted mould.
6. Leave for about 2 hours to set.