Carl,
Putting it in the simplest terms I can, the rules say that WORKING AT HEIGHT IS TO BE USED AS A LAST RESORT.
So, when it's 'last resort time', because you're faced with a large flat roof or something, then yes, you can work at height, and even maybe use a ladder.
So in those circumstances, Section 6 of the Working at Height Directive then goes onto say how that ladder should be used; ie tied off, a ladder stabilisation device or any other method of similar effectiveness.
Hey, I'm not against anyone using ladders or bungie jumping, parachuting or paragliding; whatever.
But what I would dislike is for anyone to tell a customer of mine that I'm talking out of my bottom, and just citing 'rules' 'cos I'm scared of ladders.
I can back anything up that I say with the directive and other stuff, but at the end of the day, if I can gain a small advantage over my competitors who're still using ladders as a first choice of access, then I'll use it.
Don't blame me, blame HSE!