It is up the small lane bit that is the problem. Can you get out of your house and to the permission without setting foot on a public highway or footpath?
If the road from your house to the permission is a private road then, as long as it belongs to the permission holder you can walk up it!
If you can get directly from your house to your permission holders land (ie straight through the hedge job), without crossing any public footpaths or highways then you are ok again. I know it sounds stupid, but the law can be, very!
ill have to check with the landowner on that one mate i know