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BBC Inside Science

Ordnance Survey - Britain's 220-year-old tech company; Launching synthetic voices and personality test

Duration: 41 minutes

on BBC Radio 4 LW

Available for over a year

Gareth Mitchell visits Ordnance Survey and discovers Britain's hidden high-tech master map. Acoustic engineer Trevor Cox launches the BBC's Great British Voice Test. Show more

BBC Radio 4 LW

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