13:50British Isles: A Natural HistoryEpisode 1: Three Billion Years in the MakingBBC One Duration: 47 minutes Mon 10th Mar 2014, 13:50 on BBC Two ScotlandAlan Titchmarsh travels Britain to discover why our islands are so diverse, peeling back the layers of time to reveal what shaped the landscape.ContributorsProducer:Mary ColwellProducer:Dan TapsterPresenter:Alan TitchmarshGenresFactualHistoryFactualScience & NatureNature & EnvironmentSeriesBritish Isles: A Natural History Source: BBC Online