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1895, the year of the first Proms concerts, the National Trust was founded with the aim of saving the nation's heritage and open spaces. The Trust's Director Dame Helen Ghosh and the nature writer Patrick Barkham discuss its history with Anne McElvoy.

No ticket required. Entry is on a first-come first-served basis (doors open 30 minutes before the event begins; capacity is limited)

Edited version broadcast on Â鶹ԼÅÄ Radio 3 during tonight's interval