2/7. Mid Victorian, 1860. Diarmuid Gavin tries out a surviving example of one of the most important inventions in garden history-the lawnmower. Jane Owen explores trendsetting gardens of the era at Chatsworth, Biddulph Grange and Normanby Hall. Director Helga Berry ; Producer Hannah Wyatt Gardeners' World Roadshow visits Harlow Carr on Friday at 8.30pm RT DIRECT: Gardens through Time book available for £ 20 inc p&p. Send cheque payable to Radio Times to: [address removed] or call [number removed] (national rate)