Heat 1 tbsp of oil in a wok over medium-high heat. Add the chicken and stir-fry for about 4 minutes, until browned on the outside and just cooked through. Remove with a slotted spoon and set aside.
Add the shrimp to the hot wok and fry for just 1 minute until cooked, turning once. Remove with a slotted spoon to the same plate as the chicken and set aside.
Add the remaining tbsp of oil, and the onions and carrots. Stir-fry for about 3-4 minutes until softened and just starting to color in places.
Add the ginger, garlic, and bell pepper, and fry for 2-3 minutes more.
Add the rice, peas, and scallions. Fry for 3-4 minutes, until the rice is crisping in places.
Push the rice to one side of the wok, and pour in the beaten egg. Stir until the egg is set and scrambled, then mix it into the rice.
Return the chicken and shrimp to the pan for just 1 minute to heat through. Stir in the soy sauce.
Serve hot with the reserved scallions scattered over and extra soy sauce to taste.