Every Castle Needs a Lord

S9, E11: The medieval castle of Beaudesert suddenly vanished without trace, leaving a single stone on top of a mound. The people want to know what it looked like. Built by the de Montforts in the early 12th century, "The Mount" is a popular beauty spot, but has suffered from erosion. Using authentic tools, bowyer Steve Ralphs makes a medieval longbow, which is tested against a crossbow of a similar period.