Put the berries, lemon juice water and honey into a pan and bring the contents to a gentle simmer for 10 minutes or so.
Strain the juice from the fruit through a fine sieve into a bowl and then gently push as much of the pulp through as possible. Discard the seeds. Break the gelatine into shards and soften with a little warm water in a small bowl for a couple of minutes. Pull the gelatine apart as you drop it into the berry juice and whisk it in thoroughly until completely dissolved. Pour into a jelly mould or leave to set in the bowl. Dip the mould into hot water for a few seconds or so and turn out the jelly by upending it on a plate just before serving.