Sour pleasures, authors' gardens, urban design

What do salsas, sauces for sea bass and knickerbocker glories all have in common? They're all good uses for the humble redcurrant of course! Food writer Mark Diacono shares his love of redcurrants, along with their white and pink cousins; plus interviews on famous authors' gardens with Daisy Johnson and urban garden design with Bradley Viljoen.