3/3 How pioneer botanists opened the door to a new branch of science - plant genetics. (R)
Following the men and women who are trying to light Lagos, street by street, bulb by bulb
BBC World Service
3/10 Includes chart hits by Whitney Houston, Genesis and Take That.
Melvyn Bragg and his guests discuss Laurence Sterne's comic novel Tristram Shandy. (R)
BBC Radio 4
4/5 James Walker, chair of the Nottingham Writers' Studio, discusses writer Alan Sillitoe.
BBC Radio 3
3/3 Music acquired a higher moral purpose. Romanticism blossomed in the search for the sublime (R)
2/2 Rory Stewart tells the story of how Britain was torn in two, into England and Scotland. (R)
3/4 Tim FitzHigham recreates an 18th-century bet, attempting to outrun a racehorse.
BBC Radio 4 Extra