Obstructions on both sides of the road
When the road is narrowed from both sides, neither driver has priority. Do not assume that the other driver will give way. To take control of the situation, you should slow down or stop.
Try to make eye contact so that you can decide who is going first. If the other driver flashes, they could be letting you know that they can pull into a gap to let you pass.
Or they may be telling you that they think it’s safe for you to proceed. Don’t take this message at face value. The other driver may have overlooked something. If they didn’t check their mirrors, for example, they could have missed the fact that there’s another car coming from behind that could already be moving out to pass them.
So, if the other driver flashes, proceed with caution when you think it’s safe to do so.