There are some at the end of paths I’ve been down many times that I just happen to have not noticed 😉
Though if that’s an official bridleway, I’m not sure he can do that.
Land owners try all sorts. There’s a walking path near where I live that I walk down and they built some new houses there and keep trying to block off and hide the public footpath, but everyone is trampling through. If walkers are adamant about their rights of way, then so should cyclists be. It’s bad enough we’re told to keep off everything else, we shouldn’t be denied the stupid horse tracks we’re told are the only places we’re allowed to ride as well.