In a mixing bowl add the soy sauce, oyster sauce, fish sauce and chilli flakes, and mix well. Place the noodles in a saucepan of boiling salted water and cook for 6-8 minutes, then drain and rinse in cold water to stop them cooking.
Place a wok on a medium to high heat, spray with low calorie cooking spray and cook the chicken for 3-5 minutes until browned.
Push the chicken to one side and add the onion, chilli, pepper, garlic, carrot and broccoli, and cook until broccoli is tender.
Push all the ingredients to one side and add the beaten egg. Stir until the egg has cooked through, then add the noodles and mix well.
Cook the noodles for 2 minutes then add the soy sauce mix and the chopped Thai basil. Cook until the sauce has thickened slightly.
Season to taste with salt and pepper.
Sprinkle with spring onions and serve.