Homeowner responsibilities fall under the Occupiers Liability Act. If someone suffers an injury such as a slip or fall because of your failure to attend to your walkway then you could be at risk.
You must try to maintain reasonable care of your property and this extends to lighting, getting rid of debris and fixing an uneven surface.
The occupiers act also extends to tenants of a property. Liability in a lawsuit could be shared between a tenant and a landlord.