I found Lily loose in a field, this was my experience of catching her.
I think she was hungry as she had been living wild. I took a front opening box and put in a bowl with lots of food, treats, banana seemed to be the most popular. I called her over very gently so she got used to my voice. The I waited a good distance away for a long time until she went towards the box. I think I left a trail of treats to encourage her in. I had to go back and do the same procedure every day for 3 days before she had the confidence to eat for long enough for us to close the box. Lily never moved very far from the first location I found her each time I went back.
I tried phoning the RSPCA to see whether I could loan a net or trap but they weren't very helpful in this area - that may vary elsewhere.
Oh, and don't forget to keep the bunny in isolation from any other pets if you do catch her of course.
Best of luck xx