Is there a special name for ladder stand-off that rests on the roof tiles?
A "clip-on" stand-off isn't suitable for putting on the roof because it tends to lift off the ladder. But when the soffit is wide a normal stand-off won't keep the ladder away from the gutter.
Like in this video from 5 to 10 seconds.
https://www.youtube.com/watch?v=C5eICjQhVn8
Thanks C, that was exactly what I need to know. For some reason I can see your answer in my notifications but not listed under the question. I have now modified my own stand-off with a couple of optional bolts through the forks to prevent them lifting off the rungs.