Soak the gelatine leaves in cold water for two minutes, then squeeze out any excess water.
In a small pan, bring the Sherry and blood orange juice to boiling point.
Add the gelatine and remove from the heat instantly.
Once dissolved, pour the liquid into a small tray or container, aiming for a depth of between 0.5 to 1cm.
Put in the fridge to set for a couple of hours.
Mix the shellfish, cucumber, tomato, herbs and shredded lettuce together in a bowl.
In a separate bowl, mix the mayonnaise and crème fraîche; season with the Worcestershire sauce and tabasco.
Combine the two bowls, mixing together well. Season with salt and freshly ground pepper.
Remove the Sherry and blood orange jelly, then return to the fridge.
Arrange the lettuce leaves in decorative glasses or plates and top with the shellfish mix.
Dress the samphire with a little lemon and olive oil, then scatter over the top.
Finish with the quail eggs, diced jelly and radish, top with a little caviar and serve.
