Overview: Matt Baker and Julia Bradbury embark on an epic adventure to unlock the astonishing beauty of Secret Britain. They start in the far South West of England, and the first leg of their journey takes them all the way to Dover across some of the most crowded parts of the UK. Yet even here there are hidden corners and forgotten stories. Matt explores Britain's only desert, while Julia goes off the beaten track to discover the shady green world of Dorset's holloways.