Fish and chips with tartare sauce recipe

Ingredients

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