We find special brown paper roast bags in the supermarket. Put a small biological chicken (still too much for 3p, but anyway), seasoned with pepper, salt and some curry powder (found in the cupboards) in a brown bag. For safety reasons, use another bag and some aluminium foil to protect the oven. Put 400 grams of small potatoes, with a drizzle of olive oil, in some aluminium foil. Bake in the oven at 220-240° for approx 1h. Serve with fried mixed courgettes, garlic and fresh basil.
Really, those paper roast bags do work !