You are driving on an unlit dual carriageway at night in heavy rain. Up ahead you see a slow-moving vehicle with a flashing amber beacon on its roof. What should you do?

Explanation

According to Highway Code Rule 225, flashing amber beacons warn of slow-moving or stationary vehicles, or vehicles with abnormal loads. In poor weather and at night, your visibility and stopping distance are affected, so you must approach with caution, slow down, keep a safe distance and only overtake when you can clearly see it is safe to do so.