Produced by Nine of Cups for Sky History. Past Preservers provided experts, Dr Andrew Boakye, Dr Dominic Selwood, Dr Steve Tibble & Tony McMahon. Join Professor Alice Roberts on an adventure across Britain as she decodes the truth behind its Holy Grail legends, linking Arthurian lore, sacred relics and the Knights Templar. From the Isle of Wight to Glastonbury, Oxford, London and Scotland, she’ll meet passionate locals, unearth legends of sacred vessels and ancient cauldrons and investigate Arth