I understand what you're saying malc, but I'm not talking about insurance, I'm talking about the law.
Do I have the wrong end of the stick, or IS it the law that if you can do a job from the ground then it is illegal to do it from ladders? I'm pretty sure it is, but I'm no lawyer.
Because when it comes right down to it, if that IS true , then guess what ladders pretty much ARE illegal for window cleaning.
Ive never had the need to explain this to a customer, because in my experience they understand just that you need to work safe and are happy with that. But if there are blokes going round saying "window cleaning with ladders is illegal" no offense but however much you might dislike it, that is actually true. (if it can be done with wfp.)