This is another fascinating BBC2 series, illustrating English and British history through the evolution of our art. The eight one-hour episodes, narrated by David Threlfall (Men of the World), feature:The Roman and pre-Roman periods, Beowulf, the Norman conquest and the Bayeux Tapestry;     The Black Death, Wilton Diptych, Piers Plowman, Chaucer, Julian of Norwich,…