You need to look on or get an OS map for the area, it will have all the bridleways/byways marked on it. You can get one from Waterstones in Market Harborough or order one on line.
There's some lovely bridleways around you, towards Welford/Stanford, and there is the Uk Chasers course at Park Farm which is 8 and a half miles long!
I used to keep my horses at Stanford on Avon. They have fantastic bridleways between there and South Kilworth. OS map is the best. Can look online. Also bridleways running up towards north kilworth.
Very jealous. I wish there were livery yards in S Kilworth as hacking so good, just couldnt find any. Sadly yard I was on shut down.