Cod and Corn Chowder

Name: Cod and Corn Chowder
Ingredients: 15 g butter; 2 tbsp olive oil (extra virgin); 1 red onion (finely diced); 2 sticks celery (stalks, finely diced); 1 tsp lemon thyme (leaves only); ½ tsp saffron; 1 tsp red pepper flakes (Nora pepper); 2 potatoes (small, small cubes); 4 sweet corn (medium ear); 2 leeks (small ); 2 carrots (julienned and cut into ⅓); 1 tsp sea salt; ¼ tsp black pepper (freshly ground); 1 tbsp all-purpose flour; 2 tbsp creme fraiche; 3 c whole milk; 2 c fish stock (or vegetable stock); 800 g cod (fresh); 6 slices pancetta (very thin slice); flat leaf parsley; lemon zest; black lemon zest (dried lime zest); chilli threads; Aleppo chilli flakes