You need to check with the
That's presuming it's not a restricted byway.
I have contacted West Berkshire ROW about a byway that has a fence and post blocking the entrance. It's been this way for good couple of years now. The council and police are aware and in conversation with land owner in regards to the best way forward. I suggested they enforced the law and tell him to remove said obstacles or face a bill to remove them, got no reply