Thanks Neil, Gail and Dave (Mills) for your help. I got a very prompt response from LCC who said the route was an old carriageway from Belvoir Castle so is probably not a candidate for a public right of way. However it might be worth seeing if the landowner may allow permissive access. I'll contact the local Parish Council for their advice on whether I should take this further.

Thanks Gail I had a look at that link

Thank you for that link Neil -I've submitted the form.