Neil Perry’s classic prawn cocktail

Name: Neil Perry’s classic prawn cocktail
Prep time: 15 min
Total time: 15 min
Cuisine: Australian
Ingredients: 150 gm iceberg lettuce, outer leaves and core removed, finely shredded (about ¼); 2 lemon wedges, plus extra to serve; 2 tbsp extra-virgin olive oil; 16 large cooked king prawns, peeled, tails intact and intestinal tracts removed; Cocktail sauce; 140 ml thick good-quality mayonnaise; 1 tbsp tomato sauce; 1 tsp Worcestershire sauce; 1 tsp finely grated fresh horseradish; Pinch of cayenne pepper; Dash of Tabasco sauce