Defrost the Jumbo Tiger Prawns according to the instructions on pack.
Mash avocado in a bowl, add a squeeze of lemon juice and season with salt and pepper.
To make Bucks Fizz mayo, put mayonnaise in a dish, add prosecco and most of the grated orange zest (leaving some for garnish) and mix.
To make the layered cocktail, place the mashed avocado into the base of the Kilner jars and top with a spoonful of Mayo, then 2 Tiger Prawns, followed by a further layer of Buck’s Fizz mayo and Prawns.
Finish by sprinkling the remaining orange zest and chives over the top.