I would have charged around £90 for that job.
Why do you get a small brush out to do the fiddly bits. Thay can't see from the ground.
Have you thought about getting the Gutter Lance? I got one about a month ago and think it's great.
Don't see the point selling wfp to the customers stating the safety side of it then go climbing a ladder to clean their gutters

Using this lance would cut the time working down.
When i got my lance i used it on my own home and i got a bit carried away with it.
I Cleaned all my guttering inside and out, plus Fascias, then washed all the walls down (Not because of the mess from the gutter) then cleaned the windows (wfp).
It took me just over 1.5 hours.
I'm not having a dig Stuart as it looks like you did a good job.
Craig