sentences:  As a result, the castle was extensively looted and vandalised, becoming little more than a derelict shell, although it was used in 1996 as the backdrop for "Prince Valiant", a film starring Edward Fox, Joanna Lumley and Katherine Heigl.It is currently open for guided and self-guided tours but part of the site is closed due to some dangerous parts of the castle.During the period of Tavaglione's ownership, historian Mark Baker campaigned for the castle to be brought back to its days of glory—a campaign that he started when he was twelve years old.