As above, not a lot written. There are, however unbroken lines of tradition in many areas of the Isles if you can see what's before you, and a few unbroken lines of priests/priestesses (along with a lot of modern faux, channeled or made-up stuff). Visiting standing stone sites and other old holy sites I have seen bent grass offerings to the Mother, an ancient prayer or statement of devotion. Alongside this unbroken line,there is the tradition that sunwise (not clockwise) and widdershins (not counterclockwise) are both done, appropriate to the task. Not usually mixed. Sunwise for strengthening or healing, widdershins for weakening. Some teachers open some rituals with sunwise motion and close with widdershins. Some not so much.

As an exercise, visit Stonehenge. Tourists are led widdershins around by the audio guided tour, and to me the site felt dead. After overhearing a hippieish couple gushing about the energy of the site, and smiling knowingly to myself (in the 60s, I, being straight, had to get many an over-indulging friend through the night), decided to check it. Walking sunwise produces a very different experience. After walking sunwise more than once, then passing through the entrance into the inner stones, one can feel a palpable and very visceral energy shift, as if passing through an invisible curtain, and feeling the tug as it passes through you. Everyone following me had a similar experience without being coached. If one can't or doesn't experience this, perhaps one's bloodlines are not as Celtic or Gaelic as one has been led to believe. Or perchance one needs more practice.