The legal advice I saw on TV in the UK was that you should stop your clearance/gritting at the boundaries of your own property. If you do not you are potentially liable for a claim of malfeasance against you. I believe you cannot be sued for nonfeasance, i.e. doing nothing, on others' property. It was noticeable that most shops etc. I saw hadn't cleared the pavement in front of their shops in the recent cold snap. The context on the news report was people clearing old people's paths and then callers etc. slipping and sueing.
I think you must take "reasonable care" to grit/clear your own property.
No idea if this is true or just an urban myth, just passing on what I saw on the BBC.
SSE