So check the title deeds (and/or your property's registered title). Verify if the pathway is:
a. part of your property;
b. (if 'yes' to point a) subject to easements for other property; or
c. (if 'no' to point a) owned by another property but subject to easements in favour of your property.
As you very sensibly have Legal Expenses Insurance [other members please note!], simply contact your insurer to sort it out; do nothing else yourself.
JEFFREY SHAW, solicitor [and Topic Expert], Nether Edge Law*
1. Public advice is believed accurate, but I accept no legal responsibility except to direct-paying private clients.
2. Telephone advice: see http://www.landlordzone.co.uk/forums/showthread.php?t=34638.
3. For paid advice about conveyancing/leaseholds/L&T, contact me* and become a private client.
4. *- Contact info: click on my name (blue-highlight link).