Most accidents occour when getting on or off a ladder onto a balcony or a fflat roof. Its that point in time when you have to lean across and commit your weight to the ladder but you are too far to go back.
If the ladders going to go, thats when it will happen. I'm sure all of us have felt a ladder move when doing this at some time or another.
Quite true Vince, I would never attempt to get off a balcony if the ladder was only resting on a varnished top rail.
For balconies without roof support pillars I place the ladder on the house wall, leaving enough space to keep my shoulder clear of the balcony when I go up, and I make sure that the ladder is at least 4 rungs above the highest part of the balcony top rail.
Fortunately, most baconies have convenient chairs to step onto, but beware, those folding type chairs can snap like a carrot.
Getting off the balcony onto the ladder is the biggest risk area, that's why it's assential to stand on something to raise your height when stepping off, even then you need to hold onto the ladder with one hand and the balcony with the other to prevent the ladder moving away.
Only let go of the balcony when all your weight has been safely transferred to the ladder.