The Meet the Ancestors series ends with this special that follows the story of an ancient trackway uncovered last year in Lincolnshire. A feat of ancient engineering, it was possibly used by the Celts to cross the marshy ground, but some strange items found by the track point to the fact that the site may have had greater significance for the Celts than a mere thoroughfare. With Julian Richards. Producer Suzanne Levy ; Executive producer Caroline van den Brul
Repeated with sign language next week on BBC1