Gary Biltcliffe who came and gave a talk about his co-authored book  ‘The Spine of Albion’ recently was recorded talking further about the Dragon lines, below is the video of this talk at the Dragon festival Glastonbury 2017 –

Here are the links to when Waverley dowsers visited some sites to investigate the Dragon lines at some of these ancient sites.

Catherine’s hill (nr Winchester, Hampshire)

Old Sarum an ancient hill Henge, fort and City

To understand and connect to The Spirituality of Dragons a good place to start would be the Spiritual Wizards website where connecting to Dragons is taught.
http://www.artofmodernwizardry.org/