You are driving at 40 mph on a dry, well‑lit road and intend to turn right at a busy crossroads ahead. As you begin your usual mirror–signal–manoeuvre routine in good time, you suddenly notice in your interior mirror that an emergency vehicle with blue lights and siren is rapidly approaching from behind in your lane. What should you do?

Explanation

The Highway Code Rule 179 states that you should prepare for a right turn well in advance, by checking mirrors, signalling in good time and positioning your vehicle correctly. However, you must also respond safely to changing conditions. When an emergency vehicle approaches using blue lights and sirens, you must not create a new hazard or obstruction. If moving into the right‑turn position or turning would block the emergency vehicle or cause confusion, you should cancel your right‑turn signal, maintain a normal road position, and continue straight ahead until it has passed. Options A, C and D either block the emergency vehicle or involve rushed, late positioning and signalling, which conflict with Rule 179’s requirement to prepare in good time and clearly show your intentions.