What is the core sequence of the Mirror-Signal-Manoeuvre (MSM) routine before changing direction or lane?

1. Apply the turn indicator, make the turn immediately, then check mirrors
2. Check interior and appropriate side mirror, apply the turn indicator in good time, then execute the manoeuvre safely
3. Execute the steering manoeuvre, check mirrors, and flash hazard lights
4. Check mirrors, steer across lanes, and indicate after completing the turn