Using the link below, the above review can be seen on the public web site.
On the first page scroll down to 'Beacons of the Past 2020 in Review' which is on the left.
Click on this link and read on, eventually scrolling down to watch 3 videos which in turn explain Lidar and its use in locating archaeology in the Chilterns. Such features within three of the orienteering woods used by TVOC and HH are explained in one of the videos.
With this all new knowledge you should save at least 83 seconds on your next run.
And there is a link at the end of the Review for you to join the teams and help locate and review Chilterns archaeological features. A good lockdown activity.