Allotment in field with rabbit problem

I had rabbit problem here too, it was a battle trying to stop them from coming in, everytime I thought I have blocked their way in, they found another. They used to come in via the garden next door, they lived there, the house is unoccupied, when the grass was looked after and kept short they used to hang out there then finding there way to mine, the garden and house are now neglected they do not come in at all, grass is over 3 feet high, they do not like long grass :)))