Vader posted this on Facebook and it's not a site that I've seen before so thought it worth sharing.
www.bywaymap.com
Red routes are Restricted Byways.
Orange are Restricted (but presumably sometimes open!?)
Green are Byways Open to All Traffic (BOAT) - You should check access locally though in case the Byway is temporarily closed.
www.bywaymap.com
Red routes are Restricted Byways.
Orange are Restricted (but presumably sometimes open!?)
Green are Byways Open to All Traffic (BOAT) - You should check access locally though in case the Byway is temporarily closed.