Prep: Preheat your oven to 200°C (180°C fan). Pat the chicken skin completely dry with kitchen paper - this is vital for a crispy finish.
Season: Mix the softened butter with your Chicken Seasoning to form a paste. Rub the paste all over the chicken, including under the skin of the breast if possible.
Roast: Place the chicken in a roasting tin and insert the lemon halves into the cavity. Roast for 1 hour and 15–20 minutes, or until the juices run clear.
Rest: Let the chicken rest for 15 minutes before carving. The brown sugar will have caramelised with the chicken juices to create a natural "glaze".