Just a quickie - the danger of narrow lanes is in cyclists trying to hug the side of the road.
Drivers approaching are late in seeing them, and then try to pass inappropriately, and the cyclist has nowhere to go.
Ride FURTHER out into the road - to the left on right hand bends, and the right for left hand bends - this maximises the view ahead, and the chances of being SEEN from ahead.
Be aware of the potential view ahead from any bend/dip you have just exited, and allow for a driver being distracted by an attractive view!
Keep an ear out for traffic from behind, and
as long as it is safe to do so, pull over to allow the vehicle to pass.
If it is NOT safe, then maintain your position until it is safe, OR if that might be some distance or time, then be prepared to STOP and allow the quick passage of traffic. Especially important if there are several vehicles, or several bikes.
Pedestrians can be as much a danger to cyclist on narrow lanes as cars, because they dont hear you coming, and may well be wandering in the road - obstructing your passage, or suddenly stepping in front of you.
Ring your bell/toot your horn in GOOD time, not at the last minute, which might startle them.
A pack of walkers can make matters worse by dividing to different sides of the lane, impeding your progress. However, always remain courteous - they might be picking you up off the road a bit further on!!
How am I doing so far on this one IG?