Measure out the mayonnaise, ketchup and Worcestershire sauce and mix them together in a bowl.

Add the prawns and mix until completely coated, then cover and pop in the fridge until ready to serve.

To serve, place spoonfuls of the prawn cocktail mixture onto small lettuce leaves or use as a healthy baked potato topping.

Sprinkle over a little paprika and serve with fresh lemon slices on the side.