Awfully Artful Arthur or should that be Clever Cunning Cerdic?

After almost three years 21stC schoolboy Jamie meets up with Grimm again and this time Grimm finally tells Jamie the true story of King Arthur - well almost true, as true as his memory recalls, for he is no longer the young man, but the old man. The story he tells is far from that told in the legends.
The unexpected reunion is at the annual re-enactment of the Battle of Hastings where Jamie is with the Anglo-Saxon group he has joined and Grimm has had too much to drink.
This is the final installment of Grimm Tales, that is unless the old man decides otherwise.