04:00This Sceptred Isle: The 20th CenturyEpisode 33: 1940 - Dunkirk, the Battle of Britain, and the EvacuationBBC Radio 7 Duration: 15 minutes Fri 21st Aug 2009, 04:00 on BBC Radio 7Across the decades, Christopher Lee's vivid account of Britain's fast-paced history. Narrated by Anna Massey, with Robert Powell.GenresDramaHistoricalFactualHistorySeriesThis Sceptred Isle: The 20th Century Source: BBC Online