You can't use a guttervac on every job. What do you do then - use a cherry picker on a residential property and charge them £400 'cos a ladder could be dangerous?
No that is when as a competent person if you are, you risk assess it and choose the most appropriate method for the task ahead. just a thought, if an accident was to happen do you think it is the inspector who will have to prove you did it in an un safe way or you who has to prove you met all legislation and best practice
Oh and if you are using the ladder you must make sure the user is competent to use it and the ladder has been inspected by a competent person, the ground is suitable and you take into account falling objects.
Thats alot to think about when all you need to do is chuck a ladder up and clean the gutter
and after all that ladderwork is only suitable for short durations 15-30 mins...lets hope it is a small gutter