In case you are unfamiliar with this English tradition, here's a taster:
I took this video on my camera at Walsingham last Saturday, on the eve of the feast of Our Lady of Walsingham. The various people walking past are probably from the Liverpool Union of Catholic Mothers, the Oxford Oratory or other groups gathering for the feast day.
There are various theories about the origins of Morris dancing. One of the more widely accepted is that it comes from "Moorish" dancing. One of the Walsingham walkers who spent many years in the army told me that the Moorish dancing formed part of the weapons training for the Knights Templar.