Fish and chips with tartare sauce recipe

INGREDIENTS

• 4 150g Norwegian haddock fillet
• 2 egg yolks
• 1 Dijon mustard
• tbsp white wine vinegar
• 3 vegetable oil
• tbsp capers, roughly chopped
• 200 gherkins, roughly chopped
• ml green olives, chopped
• 1 red onion, chopped
• tbsp parsley, finely chopped
• 1 plain flour
• tbsp cornflour
• 5 salt
• 0.5 cold water
• 1 lemon
• handful Maris Piper large potatoes, peel and cut into chunky chips