Easy oven-cooked Jamaican brown stew chicken

Name: Easy oven-cooked Jamaican brown stew chicken
Prep time: 20 min
Cook time: 1 h 10 min
Total time: 1 h 30 min
Cuisine: Caribbean
Ingredients: 1.6kg whole chicken; 1½ tbsp demerara sugar; 400ml hot chicken stock; 1 tbsp browning sauce (I use Grace); 1 tsp plain flour mixed with 25ml cold water; 1-2 spring onions sliced, to serve; rice and peas and slaw, to serve (optional); 8 thyme sprigs; 1 onion finely sliced; 2 garlic cloves chopped; ½ scotch bonnet pepper chopped; 2 tomatoes cut into wedges; 2 tbsp all-purpose seasoning (I use Dunn’s River); 1 tbsp chicken seasoning (I use Dunn’s River); 6 whole pimento seeds crushed; 1 tsp black pepper; 4 tbsp extra virgin olive oil