I'm a professional gardener. If I do a job where there is going to be a
lot of waste, say cutting a hedge, I charge to take the waste
away....which I promptly do by taking it to the local tip, enter
through the commercial bit, get weighed, drive through the green waste
section, empty the van, come back, get weighed and pay. Even though
I've had a van full of conifer clippings, it's never more than £10
(but have to charge more for the time taken to tip it). It's easy. I
did think it would be costly, but it's really very, very cheap.

For maintenance jobs, I can usually depend on there being a green bin.
If the council objects to this, it's ridiculous. Just because I'm being
paid to cut the grass doesn't mean it's better or worse than the
customer cutting it and putting it in the same bin! Or sometimes, I
just bag up the waste, keep it until I get a few bags and go to the tip
with some other green waste. It's only ever a few quid, so I don't mind
paying that from time to time.