The route films come from YouTube and the route maps with elevation come from Mapometer. Both set cookies when they load (Mapometer uses Google Analytics). I don't use any analytics or tracking of my own.
Accept and the films and maps load as normal. Choose no thanks and you can still read every route, see a basic map and download the GPX; films and Mapometer maps stay switched off until you change your mind.
Privacy and cookies. You can change this any time with Cookie settings at the bottom of every page.