Maybe write 80 quid for your gutter cleans?
Decent gloves, a bucket with a hook, a long pole with a gutter cleaning attachment, a ladder stand-off; these make the job less physically demanding.  Just charge well for them.
I had a shot of a gutter-vac recently from a guy who I pass the gutter cleaning jobs I don't want.  It was okay, but I think I'll just stick to doing the simple, straightforward gutter cleans from ladders.