Sprinkle jelly crystals into boiling water and stir until dissolved and liquid is clear. Allow to cool completely to room temperature, so it remains liquid.

Divide strawberries between 8 glasses and pour over liquid jelly. Place in fridge, 5 minutes, until jelly starts to set and is sticky. Slowly pour custard over jelly. Cover with plastic wrap and chill, 4 hours, until set firm. Serve.