Thank you all for your replies.
I am very aware of the limitations of what I am proposing. Really I am just putting my toe in the water, I think it will be an interesting project, a chance to learn some new skills and the right thing to do with surplus hares. If I have any degree of success I would happily scale up, but for the moment I'm happy keeping it low key.
I was thinking of catching at night, possibly using a quad, or two, to drive hares. I think I know the ground and the hare population well enough to stand a fair chance of getting a net in the right place, but I do agree that